Shimano UN55 Square Taper English Threaded Bottom Bracket

Shimano UN55 Square Taper English Threaded Bottom Bracket
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Once you've completed the transaction, we'll contact you regarding delivery and sizing to ensure your overall satisfaction. This item can be purchased online and picked up at your convenience.


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
70 x 113mm 689228778856 EBBUN55I13
70 x 118mm 689228778849 EBBUN55I18
70 x 122.5mm 689228778832 EBBUN55I22
73 x 107mm 689228778726 EBBUN55C07
73 x 110mm 689228778825 EBBUN55C10
73 x 113mm 689228778740 EBBUN55C13
73 x 118mm 689228778733 EBBUN55C18 BBS23585589M
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 BBS24417151M
68 x 122.5mm 689228778870 EBBUN55B22
68 x 127mm 689228778764 EBBUN55B27
70 x 107mm 689228778788 EBBUN55I07
70 x 110mm 689228778771 EBBUN55I10


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