SRAM, Force22, Rear derailleur, 11sp., WiFli cage,

Exact Actuation 11 speed shifting Aeroglide Pulleys Max tooth 28T for the short cage Max tooth 32T for the WiFli RD Forged aluminum B-Knuckle, magnesium inner link, carbon outer cage Weight: 178g Compatibility: 11sp cassettes and chains only SRAM Model ID: RD-FRC-B1 Primary Color Black Cage Medium RD Spring Type - RD Weight 178g Speed 11 Max Front Difference 16T Maximum Cog 32T Minimum Cog 11T RD Capacity 31T