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
|113mm / English / Square Taper / 73mm||689228778740||EBBUN55C13||210000019984|
|115mm / English / Square Taper / 68mm||689228778894||EBBUN55B15||210000019982|
|122.5mm / Italian / Square Taper / 70mm||689228778832||EBBUN55I22||210000033813|