CeramicSpeed is a world-leading performance brand, trusted by professionals for its ultra-low-friction ceramic bearings and race-proven drivetrain technology. Every product is engineered for maximum efficiency, durability, and pure speed. FEATURES: CeramicSpeed Standard Ceramic Bearings - low friction, high durability Bearing race material: hardened-steel PRESSFIT, bottom bracket type: BB86 Frame shell size (width): 86.5 mm For frame shell inner diameter: 41mm Compatible with: 24mm thru-axle spindle cranks, for example, Shimano, FSA, Rotor and others Includes: 2 Bottom bracket cups with bearings installed 2 dust covers with integrated spacers installed Spacer tube CeramicSpeed All Round Grease Sticker sheet