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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 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 ...
v. t. e. Sturmey-Archer S3X. A hub gear, [1] internal-gear hub, [2] internally geared hub[3] or just gear hub[4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the gears ...
1st Gear 1480-1600 g City Sturmey Archer: RX-RF5, RX-RD5, RX-RK5, RX-RC5, RXL-RD5, TS-RF5 2017 5 243% 3rd Gear 1905-2412 g City Sturmey Archer
Sturmey was a well known expert on bicycle gearing and his name was valuable to Bowden to give the new three-speed hub credibility. Bowden persuaded Sturmey to stay with the project and an elaborate story was concocted to give the impression of technical collaboration between Sturmey, Archer, Reilly, G.P. Mills (Raleigh's chief designer) and ...
Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns. On some bicycles there is only one gear and, therefore, the gear ratio is fixed, but most modern bicycles have multiple gears and thus multiple gear ratios.
It went on sale in the UK in 1970 and sold well, and was a key factor in reviving the company's fortunes. The Chopper featured a 3-speed Sturmey-Archer gear hub, shifted using a top-tube mounted gear lever reminiscent of the early Harley-Davidson suicide shifter – one of its "cool" features. Other differences were the unusual frame, long ...
It was a split axle three speed gear intended for use with bicycles equipped with oil bath chainguards. The original BSA 3 speed hub gear had been made under licence from the Three-Speed Gear Syndicate since 1907. The design was later to be classified as the Sturmey-Archer 'Type X', but all BSA hub gear production ceased in 1955 [42]
A derailleur for gear selection would introduce chain slack, which would interfere with braking. Gear selection can, however, be accomplished with the use of an internally geared hub. For example, a Sturmey-Archer fixed-gear three-speed hub is a fixed-gear multi-speed arrangement. Most fixed-gear bicycles only have a front brake, and some have ...
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