RED Rear Derailleur Optie:Rear Derailleur Red Aero Glide Short Cage Max 28T 147g per pedal 147g per pedal Distance pedal axle crank arm: 53mm Freedom of movement: 10° with ATAC Easy cleats Features Airline friendly size Easy load opening Interior tool pouch Bike specific handle locations and lengths Reinforced and riveted handles Heavy duty and grippy wheels Multiple tie downs and straps Minimal details for lightweight and stealth looks Interior divider for clean dirty sections 32 Color (RD): Falcon Grey Pulley bearings material: Ceramic Cage material (RD): Carbon The SRAM RED Rear Derailleur has been designed to deliver the performance advantage you've come to expect from SRAM