SRAM Red WiFli Rear Derailleur - 11 Speed Medium Cage Black Description-1/1 Bearing Tool Kit Features a steel air chamber

Features a steel air chamber

Any bicycle brand that uses the Syntace X-12 System will also be able to use these new axles

Monitors underwater estimated wrist-based heart rate during swim activities

} Formulated with natural mineral flakes & bamboo fibre particles Seals holes up to 7mm Works up to 110 psi Non-toxic & allergy free formula Advanced synthetic latex

SRAM Red WiFli Rear Derailleur - 11 Speed Medium Cage Black Description-1/1 Bearing Tool Kit Features a steel air chamberSRAM Red WiFli Rear Derailleur 11 Speed Medium Cage Black. Top of the line rear derailleur with generous use of carbon fiber and titanium for maximum performance at minimal weight. Carbon fiber and aluminum construction Ceramic bearing pulleys Titanium hardware TECH SPECS Rear Derailleur Mount Type 10x1 Standard Rear Der Shifter Compatibility SRAM Exact Actuation Cage Length Medium Drivetrain Speeds 11 Weight 152 Color Black keyword search RD4621