Sometimes options are really good, as in the times that you can buy some speed. Ceramic Bearings are smoother, faster, and wellAAAsmoother and faster. SRAM offers bottom brackets in every possible dimension and this GXP Pressfit MTB Bottom Bracket with Ceramic Bearings is designed to be pressed directly into the bottom bracket shell on your frame and help you go faster with less effort.Each ceramic bearing is factory installed into a nylon cup that has a lip on the outer edge. Installation is simple, press each bearing cup into its respective side of the bottom bracket shell until the lip rests against the outer edge of your BB92 specific frame. The rest of the crank installation is as usual -- just slide your Truvativ GXP spindle in from the right, through the bearings, and bolt on the left side crankarm. Done! The SRAM GXP PressFit MTB Bottom Bracket with Ceramic Bearings works with BB92 pressfit specific bikes only, like the Yeti AS-R Carbon. Product FeaturesMaterial: (cups) nylon, (bearings) ceramicThreading: Shell Width: Weight: 85 gRecommended Use: buttery smooth spinningManufacturer Warranty: 2 years