The Derailleur gear system moves the bicycle chain between different gears on both the crank and rear sprocket gearsets. This is achieved by displacing the chain sideways so that it 'jumps' from one ...

You mean once per decade? I've never replaced my derailleur or chain on my 15+ year old mountain bike. Yea, i could probably benefit from smoother gear changes by replacing it at this point ...

For the overwhelming majority of bicycles out there that feature multiple gears, switching between these is done purely mechanically, with a cable. Generally this uses a derailleur, which forms ...

Ignoring the International Cycling Union’s mostly arbitrary rules for what a bicycle is “supposed” to look like (at least if you want to race), there are actually reasons that ...