Shimano UN55 Square Taper English Threaded Bottom Bracket

Shimano UN55 Square Taper English Threaded Bottom Bracket
$23.99 - $24.99
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This item is not permitted to be shipped, however it 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 BBS29126478D
70 x 113mm 689228778856 EBBUN55I13
73 x 107mm 689228778726 EBBUN55C07 BBS29998134D
73 x 110mm 689228778825 EBBUN55C10 BBS29832817D
73 x 113mm 689228778740 EBBUN55C13 BBS29950856D
73 x 118mm 689228778733 EBBUN55C18 BBS29173183D
73 x 122.5mm 689228778863 EBBUN55C22 BBS29993663D
68 x 110mm 689228778887 EBBUN55B10 BBS29175470D
68 x 113mm 689228778757 EBBUN55B13 BBS29778510D
70 x 115mm
68 x 115mm 689228778894 EBBUN55B15 BBS29999082D
68 x 118mm 689228778795 EBBUN55B18 BBS29950161D
68 x 122.5mm 689228778870 EBBUN55B22 BBS29515769D
68 x 127mm 689228778764 EBBUN55B27 BBS29753659D
70 x 110mm 689228778771 EBBUN55I10