It takes a degree of passion for the sport that can’t be faked to fully appreciate SRAM RED. It was created to blur the boundaries between machine and athlete. The SRAM RED rear derailleur was designed with our Exact Actuation technology for precise, efficient shifting. Carbon fibre, titanium, and ceramic bearings complete the spec. The result adds to its legacy as the heart of the purest groupset for the pursuit of cycling excellence.TechnologyAeroGlide PulleysNew 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 ACTUATIONWhen 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. Specifications for SRAM RED Rear Derailleur •Speeds: 11 •MATERIAL: Carbon cages, Carbon inner links, Aero designed titanium hardware •WEIGHT: 145g (short cage), 165g (mid cage) •Compatibility: SRAM RED & Force Rear Shift-Brake levers, SRAM R2C Aero SL-1190 shifters, SRAM R2C Aero SL-1150 shifters, SRAM 900 Aero brake levers, SRAM 500 Aero brake levers  •FINISH: Falcon grey & black anodized •MAX TOOTH: 32T •TECHNOLOGY AeroGlide Pulleys, Exact Actuation