Hub gear
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A hub gear, internal-gear hub, internally geared hub or just gear hub is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lub
Sturmey-Archer S3X
early NuVinci hub
NuVinci internals
A Sturmey-Archer AM bicycle hub gear mechanism with the ring gear removed to show the compound (stepped) planet gears.
Sturmey-Archer
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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 durin
Hub gear
…Three-Speed Gear Syndicate, having obtained the rights to both the Reilly/Archer and Sturmey 3-speeds. Reilly's hub went into production as the first Sturmey Archer 3-speed. In 1902, Mikael Pedersen (who also produced the Dursley Pedersen bicycle) patented a 3-speed hub gear and this was produced in 1903. This was…
A Sturmey-Archer three-speed hub, the most common kind of Sturmey-Archer gear
An exploded Sturmey-Archer AW
The internals of a Sturmey-Archer FM four-speed, medium ratio, hub gear. It has substantially more components than an AW three-speed. FC, AF, AC, and ASC hubs are similar.
Sturmey-Archer X-FD front hub brake