Shimano BB-UN300 68mm Square Taper Bottom Bracket BBUN300B17

Shimano BB-UN300 BSA 68mm Bottom Bracket The high-quality and powerful Shimano BB-UN300 bottom bracket has a JIS square mount and is suitable for frames with a BSA thread and a 68mm shell width. A stabilizer ensures a constant chain line.

The Shimano BB-UN300 Bottom Bracket British Thread is a good quality bottom bracket for traditional chainsets. Super-accurate bearings for smooth operation and improved durability.Shimano BB-UN300 Bottom Bracket British Thread FeaturesDurable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fittingMaintenance-free sealed ca... morertridge bearing assembly keeps out dirt, mud, and water for long bearing lifeFast and easy installation without adjustmentNarrow-body allows clearance for cable routing under the bottom bracket