Bottom bracketPartial spec
Shimano Shimano (Tiagra / MTB) BB-ES51
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Overview
- Brand
- Shimano
- Series
- Shimano (Tiagra / MTB)
- Model
- BB-ES51
- Model number
- BB-ES51
- Type
- Bottom bracket
- Years
- 2013 to 2026
Compatibility
- Spindle
- octalink
- Bb shell
- bsa_68, bsa_73, italian_70
Specifications
- Threaded
- true
- Right cup
- steel, nickel chrome
- Axle lengths mm
- 113, 118, 121, 126
- Shell widths mm
- 68, 70, 73
- Octalink version
- hollow pipe spindle (Octalink)
- Spindle material
- steel, black
- Left adapter material
- resin
Octalink cartridge bottom bracket. Axle lengths from the 2015-2016 MTB table; the road table of the same edition lists 113 mm (68/70) for Tiagra double and 121 mm (68) for triple. The handbook shows no axle rows for the E, K and AK versions. Last listed in the 2025-2026 edition. 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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