Confused? Here’s how it works: When pedaling in the forward direction, the bike acts as a normal bike does where top of the Crank Sprocket pulls the chain and the chain then pulls on the top of ...

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 ...

The number of teeth in the chainwheel for a 70 cm wheel touring bike may be selected to be between 24 and 54, and the corresponding rear sprocket may have between 12 and 34 teeth. For a mountain bike ...