Shimano un55 bottom bracket british thread 107mm
The shimano un55 bottom bracket british thread is a good quality bottom bracket for traditional chainsets super accurate bearings for smooth operation and improved durability durable hard wearing sealed cartridge bottom bracket with square tapered spindle fitting lightweight hollow spindle maintenance free sealed cartridge bearing assembly keeps out dirt mud and water for long bearing life narrow body allows clearance for cable routing under the bottom bracket fast and easy installati