Youngran 2PCS Bearings Wheel Set Compatible for SRAM Pressfit GXP Bicycle Bottom Bracket Repair Parts MR22237 MR2437H8 24 * 37 * 8mm 22.2 * 37 * 8 * 11.5mm Leisurely

Hubs Bearing GuideThe hub is the central part of your bike's wheels (front and rear), which connects to the wheel's rim via the spokes and through which the axle is fitted, enabling the wheel to freely spin on two sets of bearings.As bikes have front and rear wheels, so too have they front- and rear-specific hubs. The front hub is simply designed to enable the wheel to spin, while the rear hub is a little more complex as it also forms part of the bike's transmission the cassette or sprocket which drives the rear wheel is attached to the rear hub, which on most bikes also features mechanism to allow you to coast or freewheel (exceptions being fixed-gear or 'fixie' bikes and track bikes).Your wheels spin more than any other part of your bike. Therefore, having the best bearings in this application is crucial to producing the best resultsItem : Compatible For SRAM1PC 22.2x37x8x11.5mm MR22237-2RS1PC 24x37x8mm MR2437H8-2RSWelcome to my shopHappy shopping

• 1PC 22.2x37x8x11.5mm MR22237-2RS
• 1PC 24x37x8mm MR2437H8-2RS