Shimano UN55 Square Taper English Threaded Bottom Bracket

Shimano UN55 Square Taper English Threaded Bottom Bracket
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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 BBS29354626D
68 x 110mm 689228778887 EBBUN55B10 BBS29162149D
68 x 113mm 689228778757 EBBUN55B13 BBS29628139D
68 x 115mm 689228778894 EBBUN55B15 BBS29931167D
68 x 118mm 689228778795 EBBUN55B18 BBS29335545D
68 x 122.5mm 689228778870 EBBUN55B22 BBS29564704D
68 x 127mm 689228778764 EBBUN55B27 BBS29153175D
70 x 107mm 689228778788 EBBUN55I07 SHI50339165T
70 x 110mm 689228778771 EBBUN55I10 SHI50386349T
70 x 113mm 689228778856 EBBUN55I13 SHI50933658T
70 x 118mm 689228778849 EBBUN55I18 SHI50373852T
70 x 122.5mm 689228778832 EBBUN55I22 SHI51404358T
73 x 107mm 689228778726 EBBUN55C07 BBS23608652M
73 x 110mm 689228778825 EBBUN55C10 BBS23196116M