Shimano UN55 Square Taper English Threaded Bottom Bracket

Shimano UN55 Square Taper English Threaded Bottom Bracket
$23.39 - $34.99
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This item is not permitted to be shipped, however it can be purchased online and picked up at one of our stores at your convenience OR we can deliver to your home or office for a $50 fee to the following counties in Maryland: Anne Arundel, Baltimore, Carroll, Harford, Howard, and Baltimore City.


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 BBS30611770D
70 x 113mm 689228778856 EBBUN55I13
70 x 118mm 689228778849 EBBUN55I18
70 x 122.5mm 689228778832 EBBUN55I22
73 x 107mm 689228778726 EBBUN55C07 BBS30743475D
73 x 110mm 689228778825 EBBUN55C10 BBS30233547D
73 x 113mm 689228778740 EBBUN55C13 BBS30907975D
73 x 118mm 689228778733 EBBUN55C18
73 x 122.5mm 689228778863 EBBUN55C22 BBS30208294D
68 x 110mm 689228778887 EBBUN55B10 BBS30162461D
68 x 113mm 689228778757 EBBUN55B13 BBS25764529G
68 x 115mm 689228778894 EBBUN55B15 BBS30462612D
68 x 118mm 689228778795 EBBUN55B18 BBS30282616D
68 x 122.5mm 689228778870 EBBUN55B22 BBS30640869D
68 x 127mm 689228778764 EBBUN55B27
70 x 107mm 689228778788 EBBUN55I07
70 x 110mm 689228778771 EBBUN55I10