Wheels Manufacturing Inc. BSA Enduro Bearings Abec 3

This Wheels Manufacturing Inc. Shimano BSA is a high quality bottom bracket that is durable and optimally sealed against dirt and water. This is an external bottom bracket with screw thread for 68 mm road bike, cyclocross and gravel frames. It features durable Enduro bearings and silicone seals. The bearings can be replaced separately, so you won't have to purchase a whole new bottom bracket when your bearings have worn out.