Rotor BB30 Road Steel Bottom Bracket BB42-68/73/85-30

BB30 steel bearings which have to be pressed directly into the bottom bracket shell of BB30 frames with 42mm case diameter. The advanced non-contact labyrinth seals give buttery-smooth spinning with unparalleled protection against dust, water and mud. Advantages of the new system are: - lighter - stiffer - low Q-factor (narrower cranks, increasing ankle clearance) - more durable because of significantly larger bearings. Compatible with Rotor 3D+ and all cranks with an integrated 30mm axle. Material: bearings: steel Weight supplement: manufacturer information