Features: brand new and high quality Fit for -- full range of cranksets, road bike sram gxp or mtb crankset, 3d24 -rotor-, aldhu24 crankset and other brand of crankset with axle diameter 24mm. G3 silicon nitride ceramic beads highlights the characteristics of higher strength and impact resistance of si3n4, making it better than metal bearings. Get loved and recommended by cycling enthusiasts, you deserve it. Its better wear resistance and heat resistance, light weight and smoothness, making the crankcases smoother during rotation. Through the conversion of the reducing ring, it can be for different brands and models of chainrings. Specifications: Name: Bike Bottom Holder Model Number: BB91/BB92 Material: Aluminum Alloy, Ceramic Palin Weight: About 94g Shield Width: 68mm-73mm Applicable Shaft: φ24mm /φ22mm Color: Black, Red ,Blue，Purple，Green，Gold，etc Package Includes: 1 x Ceramic Bottom Bracket. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!