Check the listing for details. SRAM Force WiFli Rear Derailleur - 10 Speed, Medium Cage, Black/Silver. Color: Black, Condition: New. Listed at 129.51 USD. Competition grade rear derailleur with carbon and magnesium to keep weight low. Designed for easy to set up and adjustment. Exact Actuation Ratio delivers 3mm motion per shift across the entire cassette. Must be used with SRAM Double Tap shifter. Carbon & aluminum pulley cage, magnesium inner parallelogram link. Works with standard or compact 10-speed road cranks. WiFLi version offers a wider gear range and is compatible with cassettes up to 32T. Item Specifications: Color, Silver/Black, Weight, 190, Largest Cog, 32, Chain Wrap Capacity, 37, Cage Length, Medium, Drivetrain Speeds, 10, Rear Der/Shifter Compatibility, SRAM Exact Actuation, Rear Derailleur Mount Type, 10x1 Standard, HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us