Bottom bracketPartial spec
Shimano Shimano BB-UN55
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Overview
- Brand
- Shimano
- Series
- Shimano
- Model
- BB-UN55
- Model number
- BB-UN55
- Type
- Bottom bracket
- Years
- 2012 to 2020
Compatibility
- Spindle
- square_taper
- Bb shell
- bsa_68, bsa_73, italian_70
Specifications
- Axles
- 107: 68, 70, 73; D H: 68, 70; LL113: 68, 70, 73; MM110: 68, 70, 73; XL118: 68, 70, 73; D EL127: 68; D NL122: 68, 70, 73
- Threaded
- true
- Right cup
- steel, nickel chrome
- Axle lengths
- 107, MM110, LL113, D-H, XL118, D-NL122, D-EL127
- Shell widths mm
- 68, 70, 73
- Spindle material
- steel, black
- Left adapter material
- aluminum
Square taper cartridge bottom bracket with an aluminum left cup. Axle table from the 2015-2016 handbook. First listed in the 2012 edition; it may have been sold earlier. Years are the first and last Shimano specification handbook editions that list this model number (editions checked: 2008 to 2026-2027). Shimano publishes no US price in these documents; bearing material is not stated.
For sale now
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