BBB BBB Bottom Fit BBO-85 BB30 MTB bottom bracket

Allows the installation of 24 mm spindle MTB cranksets into BB30 shells without adapters. Easy-to-install threaded design. Self-aligning bearings increases durability. Oversized cartridge bearings for MTB. Fully CNC machined external cups. Cup diameter: 42 mm. Chrome steel bearings. Fits 24 mm spindle cranksets. Fits 68/73 mm wide brackets.