RaceFace Trace J-Bend 624 Rear Hub - 12 x 148mm 6-Bolt Micro Spline BLK 32H Rear Der/Shifter Compatibility-Shimano Road Di2 If unfamiliar with this system

If unfamiliar with this system of measurement physically measure ERD yourself prior to committing to a spoke length

Significantly lighter than GXP system

X-Sync (wide-narrow) tooth profiles for great chain management

}Muc-Off Tubeless Valve Box Refill - Black Lock Nut Pack of 40

RaceFace Trace J-Bend 624 Rear Hub - 12 x 148mm 6-Bolt Micro Spline BLK 32H Rear Der/Shifter Compatibility-Shimano Road Di2 If unfamiliar with this systemRaceFace Trace J Bend 624 Rear Hub 12 x 148mm 6 Bolt Micro Spline Black 32H. Trace hubs are designed to be tough on trail and light on price. Enduro and eMTB rated with steel axles a robust hub body design and durable performance from 6902 cartridge bearings. Reliable 10 degree engagement TECH SPECS Color Black Rear Axle 12mm Thru x 148mm Cassette Body Type Shimano Micro Spline Bearing Type Sealed Cartridge Spoke Interface J Bend Defined Color Black