Zipp Sram XDR Freehub Kit For ZIPP Super 9 Rim Brake - SPR9 RB 188 Wheel Material_Carbon it eliminates the need to

it eliminates the need to "trim" the derailleur to prevent the maddening chain rub that can occur toward the back of the derailleur's cage

cadence and power data eliminates the need for extra external sensors

Say goodbye to poor shifting control

Steerer: 1-1/8”

Neck brace optimised

Zipp Sram XDR Freehub Kit For ZIPP Super 9 Rim Brake - SPR9 RB 188 Wheel Material_Carbon it eliminates the need toZipp Sram XDR Freehub Kit For ZIPP Super 9 Rim Brake SPR9 RB 188 Zipp SRAM XD R driver body suited for ZIPP Super 9 disc wheels for rim brakes. XD Driver: XD is a new cassette driver body design that allows the use of a 10 teeth small and an 42 teeth and larger big cog. Furthermore it provides an improved interface with the cassette. Genuine Zipp replacement part MPN: SPR9 RB 188 11. 1918. 077. 000 Driver body type: SRAM XDR Axle type: QR Thru Axle