Description: * new and high quality *Made of high quality material, and practical to use *Bicycle Bike Bottom Bracket Bearings For-SRAM for GXP *The 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 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 designed to enable the wheel to, 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 more than any other part of your bike. Therefore, having the best bearings in this application is crucial to producing the best results. Specification: *Material: Steel *Color: Black+Silver(As Pictures Show) *Weight: About 40g *Model: MR22237/MR2437H8-2RS *Size: 22.2x37x8x11.5mm/24x37x8mm Package Includes: 1 x Bike BearingMR22237 1 x Bike BearingMR2437H8-2RS Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_