Shift always fast, sharp and clear: change the most accurate cycling speeds offered by the rear derailleur SRAM Force. The rear derailleur SRAM Force takes full advantage of Exact Actuation ™, an actuation ratio that delivers precise 3mm changes each gear change and a range of setting the widest offering the best performances a 10-speed transmission. It is manufactured with high quality materials, the outer shell is made of carbon fiber and magnesium inner parallelogram, with an incredibly light weight of 178 g. - Exact Actuation means accuracy and consistency across the tape. - External cap carbon and magnesium inner parallelogram ensure rigidity and lightness. Speeds 10 (28 teeth maximum) Material Aluminum fork, internal Parallelogram magnesium, housing Carbon / aluminum Weight checked Roadtricks 172 g Technology Exact Actuation