Hope Pro 4 Rear Hub Bearing Kit Genuine Hope replacement bearing set for Pro 4 rear hub, everything you need to get your back wheel running smooth. HOPE PRO 4 REAR HUB BEARING KIT SRAM XD Sram XD Freehub Bearings: 2 x 6903 Stainless Enduro Bearings 1 x 17287 LLB Bearing (inner freehub) 1 x 17*26*5 (outer freehub)