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97-496: Sturmey-Archer was a manufacturing company originally from Nottingham , England. It primarily produced bicycle hub gears , brakes and a great many other sundry bicycle components, most prominently during its heyday as a subsidiary of the Raleigh Bicycle Company . In the past, it also manufactured motorcycle hubs, gearboxes and engines. The company was founded in 1902 by Henry Sturmey and James Archer under

194-674: A 68% year-on-year increase. In 2017, Nottingham came seventh in Harper Dennis Hobbes's Top 50 British Centres, behind the West End of London , Glasgow , Birmingham , Manchester , Leeds and Liverpool . The Bridlesmith Gate area has numerous designer shops, one being the original Paul Smith boutique. There are various specialist shops and small businesses in side streets and alleys: notable streets include Poultry Walk, West End Arcade and Hurts Yard and Derby Road (the latter once known for antiques). Smaller shopping areas in

291-583: A capacitor or rectifier to smooth the AC current output from the Dynohub. Rated output was reached at around 20 km/h (12 mph), a rotational speed of approximately 160 rpm. The name dynamo implies DC output, but as usual with bicycle dynamos (known as generators in North America), output was in fact alternating current . Dynohubs were offered as front hubs and as rear geared hubs. The AG

388-433: A close ratio 2 speed was introduced, this was called TC and offered a 13.46% reduction below direct drive. Hubs manufactured in the 1930s have a date stamp given as a number at the end of the model designation, this can be seen on examples of all of the hubs mentioned in this section, as well as some A and F family hubs. A 1936 TC hub would, for example, be marked TC6, TC 6 or TC-6. Sturmey-Archer's most widely known product

485-423: A common shaft to engage the gear ring and sun gear separately, while the close-ratio three-speeds, and hubs with four or more speeds, use multiple planetary geartrains. Depending on the specific hub these may be in series with each other, or with one or the other set being selectable at any given time by locking a particular sun gear to the axle. In 1921, the K hub was introduced as an updated and improved version of

582-579: A distance." During the Industrial Revolution , much of Nottingham's prosperity was founded on the textile industry ; in particular, the city became an internationally important centre of lace manufacture. In 1831 citizens rioted in protest against the Duke of Newcastle 's opposition to the Reform Act 1832 , setting fire to his residence on the site of Nottingham Castle. In common with

679-551: A four-speed close ratio model AF was released, intended as a close ratio 3 speed with an additional low gear for hills, this was discontinued in 1941 and succeeded by the near identical FC hub in 1947. 1939 also saw the introduction of the FM four speed medium ratio hub, which was mechanically very similar to the AF and FC. Post-war, in 1946, the FW four speed wide ratio hub was introduced and spawned

776-411: A higher gear, while Normal and High gears use the same pawls, requiring an alternative solution. The K hub spawned a Tricoaster version with back pedal brake, designated KC, in 1921 and both close ratio (KS), and medium ratio (KSW) variants in 1932 and 1933 respectively. With the introduction of 90mm drum brakes LBF/BF/BFC and LBR/BR/BRC in 1931, the first Sturmey-Archer 3-speed drum brake was introduced,

873-596: A letter from the prime minister, the Marquess of Salisbury to the mayor, dated 18 June 1897. Nottingham was extended in 1933 by adding Bilborough and Wollaton , parts of the parishes of Bestwood Park and Colwick , and a recently developed part of the Beeston Urban District . A further boundary extension was granted in 1951 when Clifton and Wilford (south of the River Trent) were incorporated into

970-541: A list of 20 Cities of Literature. The title reflects Nottingham's literary heritage, with Lord Byron , D. H. Lawrence and Alan Sillitoe having links to the city, as well as a contemporary literary community, a publishing industry and a poetry scene. The city is served by three universities: the University of Nottingham , Nottingham Trent University and the Nottingham campus of the University of Law ; it hosts

1067-447: A new range of duomatic 2-speed hubs, re-using the S2 name from the late 1960s, these hubs – designated S2 (freewheel), S2C (backpedal brake), and S2K (6 bolt disc brake) – share their general engineering principles with the original S2, but do not share any internal components. They offer a direct gear and an overdrive of 38%, a significant improvement for usability over the 'underdrive' gear of

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1164-535: A new two-speed hub with a backpedal shifting action similar to the Fichtel and Sachs 'Torpedo Zwei Gang Duomatic'. The S2 – Sturmey-Archer's first 2-speed hub since the demise of the T series in 1941 and the last two speed they would make in the UK – featured a direct drive and a 28.6% gear reduction. While its lack of need for a gear cable might have led to the S2 being a popular choice for small wheeled and folding bicycles,

1261-716: A number of independent schools. The city's oldest educational establishment is Nottingham High School , which was founded in 1513. The city contains several notable museums including: In 2015, the National Videogame Arcade was opened in the Hockley area of the city; being "the UK's first cultural centre for videogames". It was announced in June 2018 that the arcade was soon to close and relocate to Sheffield city centre, where it reopened in November 2018 as

1358-630: A reported population of 323,632. The wider conurbation, which includes many of the city's suburbs, has a population of 768,638. It is the largest urban area in the East Midlands and the second-largest in the Midlands. Its Functional Urban Area, the largest in the East Midlands, has a population of 919,484. The population of the Nottingham/ Derby metropolitan area is estimated to be 1,610,000. The metropolitan economy of Nottingham

1455-480: A temperature of 30 °C (86 °F) is recorded at least 1 day per year at Watnall for the period of 1991–2020, and the warmest day of the year reaches an average of 30.0 °C (86.0 °F). For the period 1991–2020 Nottingham (Watnall) recorded on average 36.9 days of air frost per year, and Sutton Bonington 42.2. The lowest recorded temperature in Nottingham (Watnall) is −13.3 °C (8.1 °F) recorded in 23 January 1963 and 13 January 1987 , whilst

1552-620: A temperature of −17.8 °C (0.0 °F) was recorded in Sutton Bonington on 24 February 1947 . The record-low maximum temperature is −6.3 °C (20.7 °F) recorded in January 1963 . For the period of 1991–2020, the coldest temperature of the year reaches an average of −5.5 °C (22.1 °F) in Nottingham (Watnall). The city centre of Nottingham is usually defined as the Old Market Square . The square

1649-419: A trademark. The GH6 version produced a rated output of 6 V, 0.33 A (2 W) from a 20-pole ring magnet with a stator having a continuous winding. Original headlamp bulbs are 6 V, 0.25 A (1.5 W) (e.g., CRY5) and a rear bulb of 6 V 0.04A (0.24W) (e.g., CRY8). This is different from a modern standard bicycle dynamo, though replacements can still be obtained. Common substitutions are

1746-467: A two piece, left hand indicating design between 1954 and mid-1958, requiring a plain drilling in the axle key and a fully drilled through axle, and a less common threaded axle key, for use with a standard AW type right hand indicating design, introduced at around the same time as the re-marketing of the AW in the late summer of 1958 and permitting the use of a partially solid axle. Sturmey-Archer had intended for

1843-409: A very wide overall range. The majority of Sturmey-Archer gear hubs can be converted to hybrid gearing by fitting a rear derailleur to the bike and finding a suitable method of attaching more than one sprocket to the hub driver. For the 'three spline' driver, an additional sprocket may be added in place of the spacers so long as care is taken to ensure the gap between the sprockets is not so great that

1940-447: Is also in the area; it was built in the 1970s on the demolished Victoria railway station site. All that remains of the old station is the station hotel and clock tower. The 250-foot-high Victoria Centre flats stand above the shopping centre and are the tallest buildings in the city . The Lace Market area just south of Hockley has streets with four- to seven-storey red brick warehouses, iron railings and red phone boxes . Many of

2037-499: Is back on the political agenda and there is now pressure on the green belt which surrounds the city. Nottingham City Council is a unitary authority , and is based at Loxley House on Station Street. It consists of 55 councillors , representing 20 wards , who are elected every four years; the last elections being held on 2 May 2019 . The council is independent of Nottinghamshire County Council but work with them for local developments and other matters. Nottingham, though, remains

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2134-576: Is dominated by the Council House , which was built in the 1920s to replace the Nottingham Exchange . The Council House has baroque columns and two stone lion statues in the front to stand watch over the square. The Exchange Arcade , on the ground floor, is a shopping centre. Tall office buildings line Maid Marian Way. The Georgian area around Oxford and Regent Streets is dominated by small professional firms. The Albert Hall faces

2231-482: Is located 33 miles (53 km) south-east of Sheffield and 45 miles (72 km) north-east of Birmingham . Nottingham is the legendary home of Robin Hood and to the lace -making, bicycle and tobacco industries. The city is also the county town of Nottinghamshire and the settlement was granted its city charter in 1897, as part of Queen Victoria 's Diamond Jubilee celebrations. In the 2021 Census , Nottingham had

2328-414: Is still available, and branded AW). According to Schraner and Brandt, an aluminium alloy shell reduced spoke breakage due to aluminium being softer allowing the spoke to seat into the flange and disperse the stress at the bend in the spoke over a wider area. The company produced front hub brakes to match such as the 70mm X-FD model, featuring sealed cartridge bearings. [1] In 2010 Sturmey-Archer launched

2425-684: Is the seventh-largest in the United Kingdom with a GDP of $ 50.9 billion (2014). Aside from Birmingham, it is the only city in the Midlands to be ranked as a sufficiency-level world city by the Globalization and World Cities Research Network . Nottingham is a major sporting centre and, in October 2015, was named 'Home of English Sport'. The National Ice Centre , Holme Pierrepont National Water Sports Centre and Trent Bridge international cricket ground are all based in or around

2522-547: Is the AW wide-ratio three-speed hub gear, introduced in 1938 (though patented in 1936) and still in production in a substantially modified form as of 2018. It is the sole survivor of a much larger range of "A" model three-speed hubs, including the AG Dynohub, AB 90mm drum brake hub, AM (medium ratio for "club" riders), the AC and AR (close ratio racing hubs for time trialists) and the ASC (a unique three-speed fixed gear ). In 1939

2619-581: The First Division , four League Cups , a UEFA Super Cup and two European Cups . During this time Forest signed Trevor Francis , Britain's first £1 million footballer, who joined the club in February 1979 from Birmingham City . The city was the site of race riots in 1958 , centred on the St Ann's neighbourhood. During the second half of the 20th century Nottingham saw urban growth with

2716-485: The Gothic revival St Barnabas' Roman Catholic Cathedral by Pugin . Nottingham Castle and its grounds are located further south in the western third of the city. The central third descends from the university district in the north, past Nottingham Trent University 's Gothic revival Arkwright Building. The university also owns many other buildings in this area. The Theatre Royal on Theatre Square, with its pillared façade,

2813-547: The University of Law and the University of Nottingham ; in the 2016/17 academic year, Trent University was attended by 29,370 students and Nottingham University by 32,515. The University of Nottingham Medical School is part of the Queen's Medical Centre . There are three colleges of further education located in Nottingham: Bilborough College is solely a sixth form college ; Nottingham College

2910-603: The modern Welsh name for Nottingham, and in English as the City of Caves . The English name of Nottingham is Anglo-Saxon in origin. A Saxon chieftain named Snot ruled an area known as Snotingaham in Old English ; the homestead of Snot's people ( -inga = 'the people of'; -ham = 'homestead'). Some authors derive Nottingham from Snottenga (caves) and ham (homestead) but "this has nothing to do with

3007-539: The 2006 introduction of the X-FDD front hub, which combines a 6v, 0.4 A (2.4 W) or 0.5 A (3 W) dynamo with a 70 mm drum brake . The XRF8, XRD8, XRR8, and XRK8 8-speed hubs entered series production in 2007. Sun Race Sturmey-Archer have modified the design and manufacture in many respects; compared to the old AW hub, the current three-speed equivalent (SRF3) now has an aluminium alloy shell for lighter weight (a painted-steel shelled 'Steelite' version

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3104-596: The ATP and WTA tours. This accolade came just over a year after Nottingham was named as the UK's first City of Football . The city is served by Nottingham railway station and the Nottingham Express Transit tram system; its bus company, Nottingham City Transport , is the largest publicly owned bus network in England. In December 2015, Nottingham was named a ' City of Literature ' by UNESCO , joining

3201-595: The AW series of large-flange hubs which were intended for discontinuation upon the SW's introduction (AW hubs were still being produced in 1956, and may have continued throughout the SW's run, despite being absent from catalogues). Compared to the AW's 25% reduction in first gear, direct-drive second gear, and 33.33% overdrive 3rd gear, the SW offered slightly wider gearing, referred to by Brian Hayes as "super-wide" gearing, with 27.7% reduction for first gear, direct-drive second, and taller 38.4% overdrive third gear. Riders appreciate

3298-848: The American credit card company Capital One ; the national law firm Browne Jacobson ; and Earache Records , an independent music company founded by local resident Digby Pearson , based on Handel Street in Sneinton . Nottingham also has offices of Nottingham Building Society (established 1849); HM Revenue & Customs ; the Driving Standards Agency ; Ofsted ; the Care Quality Commission and BBC East Midlands . The schools and aerial photographers, H Tempest Ltd, were Nottingham-based for many years, until relocating to St Ives, Cornwall January 1959. Nottingham

3395-707: The English form". Nottingham Castle was constructed in 1068 on a sandstone outcrop by the River Leen . The early history of Nottingham dates back to 919 A.D. where King Edward the Elder captured Nottingham to which he built a fortress on the southern bank of the river Trent in 921 A.D. During the Norman Conquest King William the Conqueror built a castle in Nottingham which was entrusted to William Peverel . The Anglo-Saxon settlement

3492-572: The FG Dynohub and FB 90mm drum brake hub. the FG would come to characterise the output of the heyday of Raleigh Superbe model bicycles, while the relative longevity of the FW can be largely attributed to its deployment on high end Moulton Bicycles through the 1960s until its discontinuation in 1970. The FW led to the development of a series of internally similar 'S5' five-speed models, and by 1994, Sturmey-Archer were producing seven-speed hubs. Production

3589-700: The KB. The KB was joined in 1934 by the KT 111mm tandem drum brake, part of a family of 111mm drum brakes alongside the BFT and BRT front and rear drum brakes (BR type drum brakes are not gear hubs and are instead threaded for fixed sprockets or freewheels). The KT lasted only four years, being replaced by the AT (AW based 111mm drum brake) in 1938 when the K was replaced by the AW. The AT, BFT and BRT all went out of production because of hostilities in 1941 and never re-entered production. Despite

3686-950: The National Videogame Museum. Nottingham is the East Midlands' largest economy. The headquarters of several large companies are based in the city: these include Alliance Boots (formerly Boots the Chemists ); Chinook Sciences; GM (cricket bats); Pedigree Petfoods ; VF Corporation (American clothing); Changan Automobile (Chinese-made automobiles); the credit reference agency Experian ; energy company E.ON Energy UK ; betting company Gala Bingo ; amusement and gambling machine manufacturer Bell-Fruit-Games; engineering company Siemens ; sportswear manufacturers Speedo ; high-street opticians Vision Express and Specsavers ; games and publishing company Games Workshop ; PC software developer Serif Europe (publisher of PagePlus and other titles); web hosting provider Heart Internet ;

3783-564: The Nottingham urban district extends into Derbyshire where Ilkeston and Long Eaton are administered by Erewash Borough Council , and Ripley by Amber Valley . To the north, Hucknall is governed by Ashfield District Council , while in the east Arnold and Carlton form part of the Borough of Gedling . South of the river, the town of West Bridgford lies in Rushcliffe , as do the outlying villages of Ruddington and Tollerton and

3880-403: The SW and AW (until the mid 1990s) have this neutral position. The gear ring dogs would ratchet around the clutch using the ramps and springs if the hub was trying to engage Normal and High gear at the same time, though allowing this to happen through slow shifting can cause excessive clutch wear and render the hub inoperable. In Low gear, this isn't a problem as the low gear pawls can be overrun by

3977-609: The SW to completely replace the AW hub, and had designed a complete family of SW series hubs. The SB was intended to replace the AB/ABC 3 speed hub with 90mm drum brake, and the SG was intended to replace the AG Three speed 'Dyno-Three' Dynohub. Both the SB and SG would have used a modified set of SW internals with a shortened planet cage to facilitate the additional functionality on the left side of

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4074-618: The UK textile industry, Nottingham's textile sector fell into decline in the decades following the Second World War . Little textile manufacture now takes place in Nottingham; however, many of the former industrial buildings in the Lace Market district have been restored and put to new uses. Nottingham was one of the boroughs reformed by the Municipal Corporations Act 1835 , and at that time consisted of

4171-482: The United Kingdom, Nottingham has a temperate oceanic climate ( Köppen : Cfb) and experiences warm mild summers and mild to cool winters with abundant precipitation throughout the year. There are two weather-reporting stations close to Nottingham: the former "Nottingham Weather Centre", at Watnall , about 6 miles (10 km) northwest of the city centre; and the University of Nottingham 's agricultural campus at Sutton Bonington , about 10 miles (16 km) southwest of

4268-467: The X, later FX hub (following the introduction of fine axle threading) - it is the Model X which was manufactured under license by BSA as their 3 speed hub until 1956. The new K model three speed had ratios of 75%, 100%, and 133%, the same as the later AW, however its internal workings were substantially different. Most notable was the 6-prong ramped sliding clutch which was mounted between springs, this gave

4365-430: The advantage of lateral movement being possible without shifter movement and allowed gears to be pre-selected while pedalling, the ratio would change when pedal force was relaxed, freeing the mechanism to slide into the new gear and under spring pressure. The ramped clutch dogs and sprung mount also permitted the K hub to be without a neutral position between the 'Normal' direct drive gear, and the 'High' overdrive gear, both

4462-676: The buildings have been converted into apartments, bars and restaurants. The largest building in the Lace Market is the Adams Building , built by Thomas Chambers Hine for Thomas Adams (1807–1873), and currently used by Nottingham College . The Georgian-built Shire Hall, which was once Nottingham's main court and prison building, is now home to the National Justice Museum (formerly the "Galleries of Justice"). Ye Olde Trip To Jerusalem (the Trip), partially built into

4559-492: The castle during medieval times. There are also caves beneath the Salutation that date back to the medieval period, although they are no longer used as beer cellars. The Bell Inn is probably the oldest of the three pub buildings still standing, according to dendrochronology , and has medieval cellars that are still used to store beer. Almost 62,000 students attend the city's three universities, Nottingham Trent University ,

4656-517: The castle on the hill opposite and was the French borough supporting the Normans in the castle. Eventually, the space between was built on as the town grew and the Old Market Square became the focus of Nottingham several centuries later. Defences consisted initially of a ditch and bank in the early 12th century. The ditch was later widened, in the mid-13th century, and a stone wall built around much of

4753-649: The cave system beneath Nottingham Castle, is a contender for the title of England's Oldest Pub, as it is supposed to have been established in 1189. The Bell Inn in the Old Market Square, and Ye Olde Salutation Inn (the Salutation) in Maid Marian Way have both disputed this claim. The Trip's current timber building probably dates back to the 17th or 18th century, but the caves are certainly older and may have been used to store beer and water for

4850-423: The chain will drop into it instead of moving between sprockets. Two sprocket blocks have been produced for these hubs in the past too, though these are now obsolete and hard to find. For the 12-spline driver of late 1930s and 1940s sporting hubs, similar arrangements may be made as for a 3-spline driver, however component sourcing is likely to be a bigger problem in line with the general scarcity of these drivers and

4947-571: The city are the older Flying Horse Walk , The Exchange Arcade , Hockley and newer Trinity Square and The Pod. Nottingham's Victoria Centre is the city's main retail shopping centre: it was the first to be built in the city and was developed on the site of the former Nottingham Victoria railway station . Three-speed bicycle Three-speed hubs have been in use since the early 1900s. Though they are heavier than comparable derailleur systems, internal-gear hub systems generally last longer and require less maintenance. Typically, in low gear ,

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5044-428: The city centre. The highest temperature recorded in Nottingham (Watnall) stands at 39.8 °C (103.6 °F), whilst Sutton Bonington recorded a temperature of 39.4 °C (102.9 °F), both recorded on 19 July 2022 , and the record-high minimum temperature is 20.3 °C (68.5 °F) recorded on 20 July 2022. On average, a temperature of 25 °C (77 °F) or above is recorded on 11 days per year, whilst

5141-513: The city, native wildlife includes red fox , peregrine falcon and common kingfisher . Notable nature reserves around the city include Attenborough Nature Reserve SSSI, Sherwood Forest National Nature Reserve, Holme Pit SSSI, Fairham Brook Local Wildlife Site and Wollaton Park . Due to its position as a central city with strong transport links, Nottingham has become home to invasive animal and plant species including rose-ringed parakeet , Japanese knotweed and Himalayan balsam . In 2017 it

5238-658: The city, these areas are governed by a two tier system of local government. Nottinghamshire County Council is based at the county hall. It provides the upper tier of local government whilst the lower tier is split into several district or borough councils. The County Council are responsible for Health, Social Care, Education, Highways, Transport, Libraries and Trading Standards, whilst the lower tier councils are responsible for local planning, neighbourhood services, housing, licensing, environmental health and leisure facilities. The towns of Beeston , Stapleford and Eastwood are administered by Broxtowe Borough Council . Further west still,

5335-567: The city, which is also the home of two professional football teams: Notts County , recognised as the world's oldest professional league club, and Nottingham Forest , famously two-time winners of the UEFA European Cup under Brian Clough and Peter Taylor in 1979 and 1980 . The city has professional rugby, ice hockey and cricket teams; it also hosts the Aegon Nottingham Open , an international tennis tournament on

5432-461: The city. Electric trams were introduced to the city in 1901; they served the city for 35 years until 1936. Trams were reintroduced after 68 years when a new network opened in 2004. In the sporting world, Nottingham is home to the world's oldest professional football club, Notts County , which was formed in 1862. The town's other football club, Nottingham Forest , had a period of success between 1977 and 1993 under manager Brian Clough , winning

5529-558: The county town of Nottinghamshire even though the county hall is in the neighbouring town of West Bridgford where the county council is based. The city also has a Lord Mayor who is selected by city councillors from among themselves. The position is largely ceremonial but the Lord Mayor also acts as Chair of Full Council meetings. The City of Nottingham's boundaries are tightly drawn and exclude several suburbs and towns that are usually considered part of Greater Nottingham . Unlike

5626-451: The decade). Hercules put their name on SW hubs too, though these are far less common than Sturmey-Archer branded SWs. After the failure of the SW in the market and the re-commitment to the AW, Sturmey-Archer continued to widely license the design, with fully interchangeable clones of the AW eventually being made under labels including J.C. Higgins, Sears, Austro-Daimler, Brompton, Brampton, SunTour, and others. In 1966 Sturmey-Archer launched

5723-435: The development of new public and private housing estates and new urban centres, which have engulfed former rural villages such as Bilborough, Wollaton, Gedling and Bramcote. South of the river there has also been expansion with new areas such as Edwalton and West Bridgford, adding to Nottingham's urban sprawl . Although this growth slowed towards the end of the century, the modern pressures for more affordable and council housing

5820-411: The driver to the backs of the two unique high gear pawls, with said pawls either allowed to engage the hub shell for direct drive (deep selector sleeve cutting) or tripped out such that drive is transmitted only to the gear ring (shallow selector sleeve cutting). Low gear then operates in the same way as on an AW hub, with the drive of the ring gear turning the planet cage (via the planet gears) – and hence

5917-480: The filming location of Saturday Night and Sunday Morning , was demolished in 2003 to make way for the University of Nottingham Jubilee Campus 's expansion. In 2015, Nottingham was ranked in the top 10 UK cities for job growth (from 2004 to 2013), in the public and private sectors. and in the same year, it was revealed that more new companies were started in Nottingham in 2014–15 than in any other UK city, with

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6014-473: The guidance of Frank Bowden , the primary owner of Raleigh. In 2000, the assets and trademarks of Sturmey-Archer were sold to Sun Race of Taiwan which was renamed Sun Race Sturmey-Archer Inc. and production moved to Taiwan. All Sturmey-Archer gear hubs use epicyclic (planetary) geartrains of varying complexity. The AW is the simplest, using one set of planetary gears with four planets. The AM uses three compound planets with differently sized cogs machined from

6111-528: The highest concentration of higher education providers in the East Midlands . A community existed in what is now Nottingham's city centre before the Anglo-Saxon settlement of Britain . This community was recorded under the name Tigguo Cobauc ( Brythonic : Tig Guocobauc ) by the ninth century cleric Asser , in his work The Life of King Alfred . This original name survives as Y Tŷ Ogofog ,

6208-409: The hub in use. To achieve this radically different mode of shifting gears, the hub featured a unique driver with a 4 spline keyed socket in the middle (similar to, though not interchangeable with, later 'No Intermediate Gear' AW drivers), into which sat a selector sleeve. The 4 cuttings on the selector sleeve (2 shallow and 2 deep, arranged alternately) enabled the selector sleeve to transmit drive from

6305-415: The hub. Technical drawings for both the SB and SG exist and both appeared in catalogues, however there is no evidence that either hub went into production and the AB/ABC and AG re-appeared alongside the AW in 1958. The AW had been built under license by The Hercules Cycle and Motor Company as the A type in the 1940s and the B type in the 1950s (there is no functional difference and the letter merely denotes

6402-402: The issues the SW experienced, with surviving examples showing two different planet cage retention methods (mandating two different axle designs), three different planet cage pawl ring designs, two different gear ring designs, two different sliding clutch designs, two different pawl designs and two different axle key designs, one for each of the two indicator rod designs which were used with the SW,

6499-561: The late 18th century was the German traveller C. P. Moritz , who wrote in 1782, "Of all the towns I have seen outside London, Nottingham is the loveliest and neatest. Everything had a modern look, and a large space in the centre was hardly less handsome than a London square. A charming footpath leads over the fields to the highway, where a bridge spans the Trent. … Nottingham … with its high houses, red roofs and church steeples, looks excellent from

6596-480: The late medieval period Nottingham alabasters were exported as far afield as Iceland, and may be one reason why a small number of Icelandic immigrants lived in Nottingham during the 15th century. The town became a county corporate in 1449 giving it effective self-government, in the words of the charter, "for eternity". The Castle and Shire Hall were expressly excluded and remained as detached Parishes of Nottinghamshire . One of those highly impressed by Nottingham in

6693-437: The left (low gear) freewheel, and the short planet cage, the S2 has a gear ring pressed into the shell near the middle, with the mechanism occupying little more than half of the shell volume and the rest being left empty. For this reason, the S2 has a unique shell and its internals cannot be installed in the shell of another model. The S2 is an unusual hub, with only 12,500 produced, and they are rarely available for sale. The hub

6790-484: The legends of Robin Hood , Nottingham Castle is the scene of the final showdown between the Sheriff and the hero outlaw. King John of England (formerly Prince John) visited Nottingham in 1199 and 1202. Later King Henry III of England held a court in Nottingham. By the 15th century Nottingham had established itself as a centre of a thriving export trade in religious sculpture made from Nottingham alabaster . During

6887-470: The modern standard 2.4 W headlamp bulb and a tail lamp bulb of 0.6 W. One rider reports much more light with a 6.3 V, 0.25 A (1.6 W) type 40 bulb. LED conversions are possible and will output a much brighter light than incandescent or halogen bulbs, though the LED alternatives require the fitting of a voltage regulator and will strobe 10 times per wheel revolution if not fitted with

6984-410: The nature of the gears meant that a small wheeled bicycle would struggle to obtain acceptably high gearing within the constraints of a) the size of its wheels, b) the minimum size of sprocket which could be fitted and, c) the maximum size of chainwheel which could be obtained. For these reasons, it was commercially unsuccessful. Shifting the S2's gears was achieved by reversing the pedal action such that

7081-468: The nearly silent operation of its springless 'centrifugal' pawls (while the pawls are often described as being centrifugal in operation, they in fact operate by a rocking motion as the freewheel ratchet teeth pass over them, pushing them back and forth in their slightly oversized sockets). Smaller and lighter than an AW hub, the SW was aptly, but unfortunately, described by Sturmey-Archer as having "fewer working parts than any other wide-ratio 3-Speed hub" and

7178-553: The original S2. In 2009 Sun Race Sturmey-Archer re-introduced a three-speed fixed gear hub, the S3X . This gives ratios of 100/75/62.5 (i.e. the top gear is direct drive and the others are geared down from it) and the internals are based on the newest five-speed freewheel hub (in the same way as the original fixed ASC was based on the contemporary FC four-speed hub). Sturmey-Archer made various models of 70 mm and 90 mm drum brakes with both steel and aluminium bodies. The Sturmey-Archer name

7275-587: The parishes of St Mary, St Nicholas and St Peter. It was expanded in 1877 by adding the parishes of Basford , Brewhouse Yard, Bulwell , Radford , Sneinton , Standard Hill, and parts of the parishes of West Bridgford , Carlton , Wilford (North Wilford). In 1889 Nottingham became a county borough under the Local Government Act 1888 . City status was awarded as part of the Diamond Jubilee celebrations of Queen Victoria, being signified in

7372-658: The parliamentary constituency boundaries do not align with the boundaries of the council districts of which they share their name. Nottingham is situated on an area of low hills along the lower valley of the River Trent , and is surrounded by the Sherwood Forest in the north, the Nottinghamshire, Derbyshire and Yorkshire Coalfield in the west, and the Trent and Belvoir Vales in the east and south. Within

7469-574: The perimeter of the town. A short length of the wall survives, and is visible at the northern end of Maid Marian Way, and is protected as a Scheduled Monument. On the return of King Richard the Lionheart from the Crusades in 1194, the castle was occupied by supporters of Prince John , including the Sheriff of Nottingham . It was besieged by Richard and, after a sharp conflict, was captured. In

7566-403: The primary selling point of Sturmey-Archer hubs being their offer of three gears when rivals managed only two, Sturmey-Archer produced a range of two speed hubs in the 1930s. This began with the T and TF (identical hubs, F denoting a fixed sprocket) in 1933, alongside a version with a 90mm drum brake; with a rod brake operation and freewheel, this was TB, with a rod operation and fixed wheel , this

7663-517: The rear sprocket turns faster than the wheel; in middle gear, the rear sprocket turns at the same speed as the wheel; in high gear, the rear wheel turns faster than the sprocket. During their heyday, three-speed hubs were used in all applications, including racing and time trialling, cargo cycling, utility cycling , and commuting . In many parts of the world, three-speed hubs are still preferred for commuting and other types of utility cycling over derailleur systems. This vehicle-related article

7760-421: The shell – at a reduced speed. The S2 hub features three low gear pawls mounted in its shortened planet cage, necessitating a low gear freewheel track with twelve stops instead of the 10 which would be found on a contemporary AW, this means that an S2 freewheeling in low gear will tick more frequently and more loudly than an AW in low gear at the same speed in a wheel of the same size. Because of this difference in

7857-435: The sprocket and driver rotated 1/4 turn anti-clockwise relative to the axle (the amount of pedal movement required for this is gearing dependent). The up-shift and down-shift process is the same, with the hub toggling between gears; there is a consequent risk of overshooting the desired gear. The S2 has no equivalent to the sliding clutch seen in 3- and 4-speed Sturmey-Archer hub designs, there is indeed no lateral movement within

7954-533: The sprockets which fit them. For the threaded drivers which were fitted to touring hubs before 1951, a standard thread-on freewheel may be fitted, although care must be taken to ensure there is sufficient clearance in the frame and sufficient thread engagement to ensure the setup is safe. More than three sprockets is unlikely to yield successful results. Some Sturmey-Archer hubs, by their design, are fundamentally incompatible with hybrid gearing and hybrid setups should not be attempted with them. These are: The Dynohub

8051-446: The target sectors of their economic development strategy would include low-carbon technologies; digital media ; life sciences ; financial and business services; and retail and leisure. The city formerly had a major bicycle manufacturing industry sector. Raleigh Bicycle Company was established in 1886 and Sturmey-Archer , the developer of three-speed hub gears, was also founded in the city. Raleigh's factory on Triumph Road, famous as

8148-477: The town of Bingham . Nottingham has three UK parliamentary constituency seats within its boundaries. Nottingham North has been represented since 2017 by Labour Member of Parliament (MP) Alex Norris , Nottingham East since 2019 by Labour MP Nadia Whittome and Nottingham South since 2010 by Labour MP Lilian Greenwood . Each of the outer districts (Broxtowe, Ashfield, Gedling and Rushcliffe) are also parliamentary constituencies in their own right although

8245-434: The unique crescent-shaped pawls can have slippage issues, even with correct toggle chain adjustment, as engagement of only two of the three pawls in each freewheel is insufficiently stable to hold normal levels of torque . This is more pronounced in hubs which are sticky inside from incorrect lubrication, and ones which have been allowed to wear through poor maintenance or, less commonly, heavy use. Attempts were made to correct

8342-462: Was Sturmey-Archer's hub dynamo (generator) for bicycles. The initial GH12 12-volt model was introduced in 1936 and followed two years later by the GH8. This 8-volt unit was discontinued in 1941 and replaced in 1945 by the lighter-weight GH6 6-volt version, which remained in production until 1984. The term "dynohub" is sometimes applied generically to bicycle hub dynamos, but it originates as, and remains,

8439-402: Was TBF, while a C was added to either designation to denote cable operated brakes instead of rods. In reality, an end user can easily switch between fixed and free, and rod and cable by swapping out common parts, though the hub shell will continue to show the designation for a given hub's original configuration. The T, TF, TB, TBF, TBFC, and TBC all had a 25% reduction below direct drive In 1936,

8536-451: Was also affixed to the 49 cc two-stroke engine fitted to early Raleigh mopeds , although it was actually a reworking of Vincenti Piatti's "Trojan Mini-Motor", and built by BSA's motorcycle operation . Nottingham Nottingham ( / ˈ n ɒ t ɪ ŋ ə m / NOT -ing-əm , locally / ˈ n ɒ t n ʊ m / ) is a city and unitary authority area in Nottinghamshire , East Midlands , England. It

8633-448: Was an AW three-speed rear hub with inbuilt dynamo, while the FG was a dynamo similarly combined with an FW four-speed. An SG 'Super-Wide' three-speed Dynohub was planned between 1954 and 1960, but never produced. An FG hub can be converted to have 5 gears using the same methods of modification as would be used for an FW to enable individually selectable sun gears. Hub generators were absent from Sturmey-Archer's product range from 1984 until

8730-461: Was built in 1865. King and Queen Streets are home to striking Victorian buildings designed by such architects as Alfred Waterhouse and Watson Fothergill . The Canal-side to the south of the city is adjacent to Nottingham railway station and home to multiple repurposed (as bars and restaurants) 19th-century industrial buildings. The eastern third of the city contains Hockley Village , with specialist and independent shops. The Victoria Centre

8827-468: Was discontinued in 1972 and should not be confused with the S2, S2C and S2K hubs currently manufactured in Taiwan by Sun Race Sturmey-Archer. Sturmey-Archer hubs are seen by many as an alternative to Derailleur gears , however on many models of Sturmey-Archer hub, the two can be combined to offer a setup with many of the benefits of both systems - offering more, closer spaced, gears while continuing to offer

8924-537: Was formed in 2017, by the amalgamation of Central College Nottingham and New College Nottingham (which had both previously formed from the merger of smaller FE colleges); and the Confetti Institute of Creative Technologies , owned by Nottingham Trent University, is a further education college that specialises in media. The city has dozens of sixth form colleges and academies, providing education and training for adults aged over sixteen. Nottingham also has

9021-489: Was low, and in the mid-2000s these were discontinued, hub geared bicycles having gone mostly out of fashion. The brief story of the Sturmey-Archer SW series medium-flange wide-ratio three-speed hub provides strong substantiation of the merits of the AW design. Sturmey-Archer Gears Ltd. designed the type SW Mk. 1 medium-flange wide-ratio three-speed hub in 1954 and began production by 1955, intending it to replace

9118-507: Was named one of the UK's six science cities in 2005 by the then Chancellor of the Exchequer Gordon Brown . Among the science-based industries within the city is BioCity . Founded as a joint venture between Nottingham Trent University and the University of Nottingham, it is the UK's biggest bioscience innovation and incubation centre, housing around 80 science-based companies. In 2010, Nottingham City Council announced that

9215-662: Was originally confined to the area today known as the Lace Market and was surrounded by a substantial defensive ditch and rampart, which fell out of use following the Norman Conquest and was filled by the time of the Domesday Book (1086). Following the Norman Conquest the Saxon settlement developed into the English Borough of Nottingham and housed a Town Hall and Law Courts. A settlement also developed around

9312-447: Was reported that Nottingham was one of a number of UK cities that broke WHO air pollution guidelines for the maximum concentration of small particulate matter; the pollution in part being caused by harmful wood-burning stoves. Nottingham is bounded by a green belt area, provisionally drawn up from the 1950s. Completely encircling the city, it extends for several miles into the surrounding districts, as well as towards Derby. Like most of

9409-451: Was thought to be less costly to manufacture than the AW series that had been in production since 1938. The new hub turned out to be slow to engage drive because the mode of pawl engagement necessitated fewer freewheel stops and could not be "pre-shifted" like an AW can while changing 'up', and the AW's predecessor, the 'K', can while changing in either direction. This pre-selection of gears was never advocated by Sturmey-Archer. More troubling,

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