Shimano ZEE RD-M640-SS Rear Derailleur - 10 Speed Short Cage Gray With Clutch Wide Ratio Freeride MFPN=RF726-GKSK-B2 - VENTILATION: Optimized vent placement

- VENTILATION: Optimized vent placement and internal channels help provide cooling during intense climbs and summer rides without sacrificing speed

75 Tire Diameter/ISO 26/559 e-Bike approved No Size 26X1

Constructed of 4-way stretch elastic material that is engineered for increased compression and fit without heat retention

Perfect for low-torque applications such as stem bolts levers and carbon fiber components

Shimano ZEE RD-M640-SS Rear Derailleur - 10 Speed Short Cage Gray With Clutch Wide Ratio Freeride MFPN=RF726-GKSK-B2 - VENTILATION: Optimized vent placementShimano ZEE RD M640 Rear DerailleursShimano's stabalizing Shadow RD+ clutch technology is proven to reduce chain slap and noise Largest Cog 36 Color Gray Rear Der Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 10 Weight 250 Chain Wrap Capacity (teeth) 25 Cage Length Short