SRAM Red WiFli Rear Derailleur - 11 Speed, Medium Cage, Black Pedal Service Parts - Airfoil posts up to

- Airfoil posts up to 3

Manufacturer Part Number: 442-24221

Update: Dec 2025

- *CP-15125 fitment includes: 11 speed Chorus and 10 speed Ultra-Torque bottom brackets

Axle conversion kits for RaceFace Vault hubs

SRAM Red WiFli Rear Derailleur - 11 Speed, Medium Cage, Black Pedal Service Parts - Airfoil posts up toTop 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 Product Specifics 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 Chain Wrap Capacity (teeth): 37 Largest Cog: 32