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The bicycle wheel hub is the motor. The power levels of motors used are influenced by available legal categories and are often, but not always limited to under 750 watts. With a front-drive the motor sits in the front hub, and with a rear-drive the motor sits in the rear hub.
Rear drive often uses "idler" pulleys to route the chain; front-wheel drive can eliminate idlers, so offers less friction and also less weight. It can also increase luggage capacity. However, front drive with two front wheels uses some non-standard components, and as of 2017 is used only rarely. As with other cycles, a velomobile may use ...
Honda FCX Concept 2005 in-wheel motor with high-voltage wires in orange. Running high voltage outside the chassis can be avoided by using near-wheel motors, which have similar advantages to in-wheel motors. Hub motors are attractive from a design standpoint because of their flexibility. They can be used for front-, rear-, or individual-wheel ...
This article lists notable electric bicycle brands and manufacturers including electric unicycles. Many bicycle brands do not manufacture their own product, but rather import and re-brand bikes manufactured by others, sometimes designing the bike, specifying the equipment, and providing quality control.
The rear triangle consists of the seat tube and paired chain stays and seat stays. The chain stays run parallel to the chain, connecting the bottom bracket to the rear dropout, where the axle for the rear wheel is held. The seat stays connect the top of the seat tube (at or near the same point as the top tube) to the rear fork ends.
A "mid-drive" or "crank-drive" motor set-up on an electric bicycle does indeed allow the operator to change gears in the power drive system between the motor and the rear wheel of the bicycle. Whether or not such a mechanism which allows the operator to change gears satisfies the wording that requires the operator to change gears is a matter of ...