Material makes the difference: Exact Actuation™ combined with materials upgrades yields world-beating performance and weight savings. Light weight, precision and fluid performance put the new SRAM Red Derailleur in a class of its own. Based on the already-superior design of the SRAM Force Rear Derailleur, the Red offering delivers even greater advantages thanks to a diet of structural carbon and titanium. Hybrid ceramic bearing pulley and titanium parallelogram pivot bearing refinements further supercharge the overall component speed, accuracy and durability. Amazingly, these design choices yield and astonishing 153g mechanism. Exact Actuation means precise, even gear changes throughout the shifting range. Carbon-fibre out cage and magnesium inner link provides strength and light weight.