Rear DerailleurDonanımREAR DERAILLEUR The rear derailleur is a critical part of the bicycle’s drivetrain. It moves the chain between the different cogs on the cassette to change gears and maintains tension on the chain.Inspect
RimDonanımRIM The rim is the circular outer part of the wheel to which the tire is attached. It is connected to the hub by spokes. Rims are typically made of aluminum alloy or carbon fiber. On bikes with rimInspect
Rotor (Disc Brake)DonanımROTOR (DISC BRAKE) The rotor (also called a disc) is the metal disc component of a disc brake system that is bolted to the wheel hub. The brake pads inside the caliper clamp onto the rotor to slow Inspect