Sram force 10 speed rear mechthe sram force rear derailleur offers extremely precise shifting developed with cutting edge materials and based on the same sram design philosophy that has continued to produce the best in class products the sram force rear derailleur takes advantage of exact actuation delivering precise identical 3mm adjustment for smooth shifting without variation in effort through every gear in the 10 speed shifting range the sram force rear derailleur is crafted with a car