Features of SRAM Rival 22 Short Rear Derailleur 28T Maximum Rear Cog Sacrifice nothing - not durability, dependability, or Performance Uses Exact Actuation cable pull ratio for eay set-up and reliable shift Performance Works with standard or compact 11-speed road cranks Aluminum cage and parallelogram, stainless steel hardwAre Compatible with SRAM road shifters and 10 speed MTB shifters Aluminum cage and parallelogram