Shimano's BB-UN55 Square Spindle Bottom Brackets are the unofficial standard for English-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 / English / Square Taper / 68mm||689228778801||EBBUN55B07||210000012635|
|110mm / Italian / Square Taper / 70mm||689228778771||EBBUN55I10||210000020003|
|118mm / English / Square Taper / 68mm||689228778795||EBBUN55B18||210000012634|