Red Rear Derailleur - SRAM Red WiFli Rear Derailleur - 11 Speed, Medium Cage,
MPN: 00.7518.084.001 - SRAM - Red Rear Derailleur - Rear Derailleur. Top-of-the-line rear derailleur with generous use of carbon fiber and titanium for maximum performance at minimal weight. Rear Derailleur Mount Type 10x1 Standard.