Delivering full sized performance in a compact sized package, the Acolyte Super Short rear derailleur provides a full set of features for off road riding on a platform that's compatible with small wheel sizes down to 20". With the same features as the standard sized Acolyte, you can ride Super Short as hard as you want, no matter how tall you stand. Innovative SpringLock chain retention keeps chain in place over rough terrain and can be turned on and off. Direct path cable routing for smooth and responsive shifting. Compatible with 11-34T to 11-38T 8-speed cassettes. Compatible with Acolyte shifters only. Item Specifications: Cage Length: Short, Chain Wrap Capacity (teeth): 27, Color: Black, Drivetrain Speeds: 8, Largest Cog: 38, Rear Der/Shifter Compatibility: microSHIFT Acolyte, Rear Derailleur Mount Type: 10x1 Standard,