Adopting all the technologies that provide the fastest, quietest shifting available, the new SRAM Force® 22 Rear Derailleur has been designed with our Exact Actuation® technology for precise, efficient shifting throughout the extended gear range.We have given and even refining tooth geometry of the jockey wheel.The result is that the chain that runs smoother and quieter than ever before.With all the additional technologies we´ve managed to keep the weight the same, at well under 200 grams.Features:- Exact Actuation shifting provides fast, accurate shifts- AeroGlide pulleys optimized for silent shifting- Aluminum outer and inner cages- Weight:180gSpecifications:- Speeds:11- Material:Aluminium outer & inner cages , Aluminum links, Stainless steel hardware- Weight:180g- Compatibility:Cassettes from 11-25 to 11-28- Finish:Grey & black anodized finish- Technology Highlight(s):Exact Actuation®/ AeroGlide Pulleys®Technology:AeroGlide Pulleys®:New tooth pulley design with a sound damping effect for a super efficient and silent ride experience.Bottom and top pulleys benefit from this feature.EXACT ACTUATION®:When we launched our road technology from scratch we reapplied our MTB proven SRAM 1:1 actuation ratio (shifter cable travel :derailleur movement) for 10 speed rear shifting.EA helps to simplify/stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension.The result:the easiest index shifting system to set up and it stays that way.For 2x10V systems.- Compatible with cassettes 11-42T.