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2. Freewheel - Wikipedia

   en.wikipedia.org/wiki/Freewheel

   A freewheel clutch is now used in many motorcycles with an electric starter motor. It is used on many combustion-engined mowers. It is used as a replacement for the Starter solenoid (or the older Bendix drive) used on most car starters because it reduces the electrical needs of the starting system and gives reduced complexity. [citation needed]

3. Locking hubs - Wikipedia

   en.wikipedia.org/wiki/Locking_hubs

   The hub is a component where the wheel is directly mounted to, and is outside the axle. The benefits of unlocking hubs for normal road use are mainly found in increased fuel efficiency . When the front hubs are locked, even if no power is sent to the front axle (by means of a transfer case ), the turning of the wheels will still spin the front ...

4. Freehub - Wikipedia

   en.wikipedia.org/wiki/Freehub

   Freehub vs freewheel hub. The freehub concept answers several drawbacks encountered with the freewheel design: Freewheels are threaded onto an axle hub, using conventional right-hand threads. As the bicycle rider pedals, the freewheel is continuously kept tight, as chain torque is in the right-hand direction. This becomes a problem when the ...

5. Sprag clutch - Wikipedia

   en.wikipedia.org/wiki/Sprag_clutch

   A sprag clutch is a one-way freewheel clutch. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used. When the unit rotates in one direction the rollers slip or free-wheel, but when a torque is applied in the opposite ...

6. Front freewheel - Wikipedia

   en.wikipedia.org/wiki/Front_freewheel

   The Shimano Front Freewheel (FFS) was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings – enabling the rider to shift gears while coasting. [2] FFS rear freewheel is different than a standard freewheel because it's "stiff" with more friction than a normal rear freewheel.

7. Cogset - Wikipedia

   en.wikipedia.org/wiki/Cogset

   A freewheel and freewheel hub A freehub (above) for use with a cassette and a threaded hub (below) for use with a freewheel. A freewheel (also known as a block) consists of either a single sprocket or a set of sprockets mounted on a body which contains an internal ratcheting mechanism and mounts on a threaded hub. Threaded rear hubs were ...