Shimano's BB-UN55 Square Spindle Bottom Brackets are the unofficial standard for threaded cartridge bottom brackets. Quality, value, and durability come together to keep you cranking for many, many miles.
- Fits JIS Square-Taper Cranksets
- Hollow spindle
- Crankarm fixing bolts not included
|107mm / Square Taper / 70mm (Italian)||689228778788||EBBUN55I07||43052|
|110mm / Square Taper / 70mm (Italian)||689228778771||EBBUN55I10||43056|