Improved seals keep dirt and water out of the bearings to keep your crank spinning for a long time.

• Small ball bearings are fitted into aluminum cups to provide a smooth rotation.
• Fits 68mm and 73mm bottom bracket shells.
• Includes left and right bottom bracket cups.
• (B.C.1.37in. x 24T) English Thread.
• Includes 3 x 2.5mm spacers and an installation adapter.