Derailleurs are the transmission of your bike. When you shift, they guide the chain to the correct gears. Whether you’re fixing a particular problem with your chain or simply giving the system a ...

They slipped it under our noses inside an April Fool’s tease, but the UK-made Ratio Mech mechanical rear derailleur is real.

The Earth is not flat, and neither are many cycling trails. One of the major appeals of a modern mountain or racing bike is its ability to shift gears based on the terrain. Riders can choose a higher ...

[Nabil] sent in an awesome electronic bicycle derailleur. Now, instead of pulling a steel cable with a shifting mechanism, [Nabil] can change gears electronically. As a bonus, the derailleur can be ...