SRAM Rise 40 and v2 X.9 QR Rear Axle Kit ModelNumber=K4257 Ramped paddle shaped center knobs

Ramped paddle shaped center knobs roll efficiently and provide excellent traction for climbing and braking

Compatible with Dura Ace 9000 Ultegra 6800 105 5800 Tiagra 4703 and Tiagra 4700

Please note that radial lacing voids the manufacturer's warranty

}SRAM Flat Mount Frame Disc Caliper Bracket Bolts 42mm Titanium

NOTE: The following "RK" part numbers will not be compatible with the new Rear Disc Racks: RK013 RK0121 RK0134

SRAM Rise 40 and v2 X.9 QR Rear Axle Kit ModelNumber=K4257 Ramped paddle shaped center knobsSRAM Rise 40 and v2 X. 9 QR Rear Axle Kit. Axle set includes axle and end caps. Does not convert a hub or wheel to a different axle diameter or length