Center chain SHIMANO BB-UN300 73/122.5mm

Shimano BB-UN300 Bottom Beam – BSA 73mm – JIS Square Taper

The high-quality and performance-oriented Shimano BB-UN300 cassette bottom bracket is equipped with a JIS square taper mount and is designed for frames with BSA threads and a 73 mm shell width. The stabilizer ensures a constant chain line.