Shimano BB-UN55 bottom bracket British thread 68 - 118 mm

Super-accurate bearings for smooth operation and improved durability

118mm for 68mm bottom bracket shell, 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 Fast and easy installation without adjustment

Narrow body allows clearance for cable routing under the bottom bracket

Shimano code: BB-UN55