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 ...

The drivetrain on a bike enables you to pedal forward and typically change between gears, making it easier or harder for you to ride on a given gradient. Put simply, your bike's drivetrain consists of ...

We’ve already spotted Shimano’s clutch-equipped Ultegra RX derailleur on the cobbled roads of Flanders. Now, Shimano is releasing the complete details of this addition to Shimano’s Ultegra line.