The SRAM Force Rear Derailleur represents the same design philosophy that has yielded our best-in-class products for the MTB market. The Force takes advantage of Exact Actuation, an actuation ratio that delivers precise 3mm shifts in every gear along with the widest range of adjustment available, delivering speed and performance.Carbon & aluminum pulley cage, magnesium inner parallelogram linkMust be used with SRAM Double Tap shifterExact Actuation Ratio delivers 3mm motion per shift across the entire cassetteWorks with standard or compact 10-speed road cranksItem SpecificationsColorBlackIntended UseRoadCassette SpacingShimano RD 10,SRAM 10Shifter/Derailleur CompatibilitySRAM 10Largest Cog28teethChain Wrap Capacity33teethDerailleur ActionTop-Normal (Traditional)Cage LengthShort