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Disc wheels are designed to minimize aerodynamic drag. A full disc is usually heavier than traditional spoke wheels, and can be difficult to handle when ridden with a cross wind. For this reason, international cycling organizations often ban disc wheels or limit their use to the rear wheel of a bicycle. However, international triathlon ...
Brake: devices used to stop or slow down a bicycle. Rim brakes and disc brakes are operated by brake levers, which are mounted on the handlebars. Band brake is an alternative to rim brakes but can only be installed at the rear wheel. Coaster brakes are operated by pedaling backward; Brake lever: a lever for actuating a bicycle brake
Bikes exist that blur the distinction by combining attributes of both, however. One example of this is a Monstercross bike, often using a standard mountain bike frame intended for use with 26″ wheels with 700c [citation needed] wheels and 700 × 38c-45c tires, disc or cantilever brakes, MTB or cross gearing, and the drop bars of a cyclocross ...
For a normal wheel size and spoke count, only the latter is suitable for a wheel that has to transmit torque from the hub to the rim, as with rear wheels or hub brakes. This rule is occasionally broken where a very large number of spokes is used, or the wheel is unusually small in diameter, either of which reduces the amount of increased ...
The mechanism was invented in 1927 by Tullio Campagnolo, an Italian bicycle racer. He was frustrated when he attempted to change gears during a race. At the time there was but one cog on each side of the rear hub, so gear changes necessitated stopping, removing the rear wheel, flipping it over horizontally so that the opposite cog is engaged by the chain, and finally reinstalling the wheel.
A mountain bicycle with disc brakes is less susceptible to mud buildup provided the rear frame and front fork yoke have sufficient clearance from the wheels. Disc brakes may be made of materials that dissipate heat better than the wheel rim, but undersized sport-sized discs will be too small to take advantage of this fact.
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