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A quick release skewer is a mechanism for attaching a wheel to a bicycle. It consists of a rod threaded on one end and with a lever operated cam assembly on the other. The rod is inserted into the hollow axle of the wheel, a special nut is threaded on, and the lever is closed to tighten the cam and secure the wheel to the fork.
Portage strap: a strap (usually made of leather) attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easier; Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is ...
In 1930, he patented the cam mechanism quick-release skewer that became the standard for the industry. In 1933, the first quick release hubs were produced by Campagnolo. Also in 1933, he patented the sliding hub, dual seatstay rod-operated, back-pedal derailleur, ultimately known as the 'Cambio Corsa'. In 1949, he introduced the 'Gran Sport ...
The unified rear triangle or "URT" for short, keeps the bottom bracket and rear axle directly connected at all times. Suspension action is provided between the rear triangle, which unites rear axle and bottom bracket, and the front triangle, which unites seat and front axle. This design uses only one pivot, which keeps the number of moving ...
A fork end, [1] fork-end, [1] or forkend [2] is a slot in a bicycle frame or bicycle fork where the axle of a bicycle wheel is attached. A dropout is a type of fork end [3] that allows the rear wheel to be removed without first derailing the chain. Track bicycle frames have track fork ends, on which the opening faces rearwards. Because they do ...
The axle is attached to dropouts on the fork or the frame. The axle can attach using a: Quick release - a lever and skewer that pass through a hollow axle designed to allow for installation and removal of the wheel without any tools (found on most modern road bikes and some mountain bikes).
10-speed bicycle cassette. On a bicycle, the cassette or cluster [1] is the set of multiple sprockets that attaches to the hub on the rear wheel. A cogset works with a rear derailleur to provide multiple gear ratios to the rider. Cassettes come in two varieties, freewheels or cassettes, of which cassettes are a newer development. Although ...
Before epicyclic gears were used in bicycle hubs, they were used on tricycles. Patents for epicyclic hubs date from the mid-1880s. [5] [6] The first patent for a compact epicyclic hub gear was granted in 1895 to the American machinist Seward Thomas Johnson of Noblesville, Indiana, U.S.A. [7] This was a 2-speed but was not commercially successful.
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