The quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68 mm shell width. A stabilizer ensures a constant chain line.
- Square Type Bottom Bracket
- Quality/performance cartridge bearing square bottom bracket
- Better chainline stability with chain line stabilizer
BB-UN300 BOTTOM BRACKET 68x118mm W/O FIXING BOLTS