41mm pressfit bottom bracket with steel bearings for maximum comfort and long life. A bottom bracket is an important part of your drivetrain, which is why Rotor creates their own bottom brackets specifically designed for their bottom brackets, and thus have a formidable efficiency.Details :High bearing quality, with steel bearingsFrame compatibility: Pressfit 41Casing length: 86.5-92mmCrankset: Rotor 24mmWeight: 61gCompatibility:Rotor 24mm, 3D24, REX 3Shimano Hollowtech IIHow to identify my bottom bracket?Your bike creaks when you press hard on the pedals, the movement of the crankset has lost its fluidity or has become loose? The symptoms are clear: it's time to change your bottom bracket. Like all the parts that make up your bike, the bottom bracket and especially its bearings are subject to wear.Its replacement is a simple operation if it is well prepared, indeed the multiplication of the standards of bearings, bottom bracket and frame will discourage some. We will t...