Shimano BB-UN300 68mm Shell Square Taper Bottom Bracket - English Thread - Chain Case

- For use with bicycles equipped with a chain case (right hand cup sits out a little further compared to regular variants)
- 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
- 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
- Better chainline stability with chain line stabilizer