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I would not call it convention but rather a reasoned design choice: most people are right-handed and one shifts the rear gears more frequently, therefore right shifts rear. This is the same worldwide for all integrated shifters, which integrate the brake and shift mechanics. Brakes however are often reversed in countries, like the UK, where traffic runs on ...


You can replace the smallest cogs on cassette. For example see the "Building custom cassette" at http://sheldonbrown.com/k7.html. For example, Shimano doesn't make any true "corncob" (one-tooth-jump) cassettes for time-trialists or flatland riders. In 7 speed, the closest is the J (13/14/15/16/17/19/21). If you remove the 21-tooth sprocket from ...

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