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