Innenlager US-BMX (Für Einteilige Tretkurbel) - Ruff Cycles
Let's Pedal, but not without a decent Bottom Bracket Bearing Kit. The Ruff Bottom Bearings are made of high quality Bearings to ensure a long life on your bike. The Kit contains everything you need to install an One Piece Crank.
Powdercoated in Black these should fit any coloured bike.
The internal diameter of the bearing shell for the BB lug is: 51,5 mm