Shimano UN300 Bottom Bracket 68×122.5mm

SHIMANO quality/performance cartridge bearing square bottom bracket

Better chainline stability with chain line stabilizer

Narrow body allows clearance for cable routing under the bottom bracket

chain case options, E-type, Standard

Adapter material: Aluminum

Super-accurate bearings for smooth operation and improved durability

Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting

and water for long bearing life, Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud

Fast and easy installation without adjustment

Size – 68×122.5mm