SRAM XX1 Rear Derailleur - 11 Speed Medium Cage Black MFPN=C04HJ12B20CASPK Backing Plate Material Aluminum Compound

Backing Plate Material Aluminum Compound Organic Heat Sink Yes Pad Shape Number 1

650-700c wheel sizes with tire width up to 32 - 50mm

Internal parts are cross-compatible across 10

breathable

SRAM XX1 Rear Derailleur - 11 Speed Medium Cage Black MFPN=C04HJ12B20CASPK Backing Plate Material Aluminum CompoundSRAM XX1 Rear Derailleur 11 Speed Medium Cage Black. Professional grade derailleur built with carbon fiber and aluminum featuring roller clutch pulley cage and cage lock feature for easy wheel installation. Wide tooth narrow tooth pulley wheel maximizes chain control by fitting inner and outer chain links perfectly X Horizon design maintains constant chain gap across all gears and eliminates ghost shifting Roller bearing clutch eliminates derailleur