Rotor PF41 Steel Bottom Bracket Compatible with all BB86/92 Press-Fit system frames that are manufactured to Shimano specifications, The PF41 Steel Bottom Bracket from drivetrain experts Rotor is available for use with either 24mm spindle cranksets and 30mm spindle types too. The updated, advanced non-contact Labyrinth seals yield a super-smooth spin with unparalleled protection against dust, water and mud.Features: Material: CNC machined 7075 Aluminium Type: Press-fit Bottom Bracket Shell Compatibility: Compatible with BB86, BB89 road & BB92 mountain bike (MTB) Press fit (41mm) systems Bottom Bracket Shell Dimensions: 86/92 x 41mm Use: Road, Mountain Bike (MTB), Cyclocross (CX) Lathed, heat treated Alloy cups Labyrinth seals prevent bearing contamination 30mm spindle option for all Rotor and 30mm axle cranks 24mm spindle option for all Rotor and Shimano compatible 24mm cranks Weight: 61gBuy Rotor Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.