Rotor PressFit 4130 Steel Bottom Bracket Black

This Rotor PF4130 PressFit Bottom Bracket with Steel Bearings adapt your BB86, BB89 or BB92 equipped frame to Rotor's 30mm thru-axle cranks. The BB86, BB89, BB92 standards all have an inner diameter of 41mm, with the width being 86.5mm, 89.5mm or 91.5mm. The 30mm inner diameter matches the external diameter of the thru axle. The new, advanced non-contact labirynth seals yield a buttery-smooth spin with unparalleled protection against dust, water and mud. Ultra rigid plastic caps give high compression and deformation resistance, facilitating crisp shifting.