SHIMANO BB-UN300 SQUARE TAPERED BOTTOM BRACKET 68*113

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 68/73 mm shell width. A stabilizer ensures a constant chain line.

FEATURES

• Fits JIS square-taper cranksets
• Crankarm fixing bolts sold separately
• Hollow spindle
• Adapter: aluminium (left), aluminium / steel (right)
• Axle: steel