Details
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
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| 68 x 107mm | 689228778801 | EBBUN55B07 | |
| 73 x 107mm | 689228778726 | EBBUN55C07 | |
| 73 x 110mm | 689228778825 | EBBUN55C10 | |
| 73 x 113mm | 689228778740 | EBBUN55C13 | |
| 73 x 118mm | 689228778733 | EBBUN55C18 | SHI32994959B |
| 73 x 122.5mm | 689228778863 | EBBUN55C22 | |
| 68 x 110mm | 689228778887 | EBBUN55B10 | |
| 68 x 113mm | 689228778757 | EBBUN55B13 | |
| 68 x 115mm | 689228778894 | EBBUN55B15 | |
| 68 x 118mm | 689228778795 | EBBUN55B18 | |
| 68 x 122.5mm | 689228778870 | EBBUN55B22 | |
| 68 x 127mm | 689228778764 | EBBUN55B27 |
Shimano UN55 Square Taper English Threaded Bottom Bracket
$25.99