Pressfit Bearing To Fit 41Mm Bb Aperture For Use With 24Mm Axle Cranks Use Same Bearing For Road & Mtb Applications (Mtb Bb89 & Bb92) For Use With Press Fit Bb86 Systems. Extensively Usd By Giant, Scott And Some Trek Bbs This Bb Can Be Used With All Rotor 24Mm Axle Cranks. Compatible With Bb86 Press Fit (41Mm)System Frames. Bb86 For Road Bikes And Bb89 & Bb92 For Mtb Standards. Features: Weight 65Gms Black Only New Advanced Non Contact Laberynth Seals Give Buttery Smooth Spinning With Unparalled Protection Against Dust Water And Mud. Ultra Rigid Plastic Cups Give High Compression And Deformation Resistance Facilitating Crisp Shifting. Compatible With All Press Fit System Frames Manufactured With Shimano Specifications.