Shimano UN54 Sealed Bottom Bracket JIS
A good quality bottom bracket for traditional square taper JIS chainsets
Super-accurate bearings for smooth operation and improved durability
Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting
Lightweight hollow spindle
Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life
Fast and easy installation without adjustmentNarrow body allows clearance for cable routing under the bottom bracket
English thread - 68mm shell width
Sizes available: 110mm, 113mm, 115mm, 118mm, 122.5mm, & 127mm
Fit and forget... Last ages