Excellent box works very well
"Excellent box works very well"
Couldn't load pickup availability

For use with 68 mm frames and 24 mm crank axles, the threaded bottom bracket SHIMANO Tiagra BB-RS501 BSA Hollowtech II bottom bracket features even smoother, more sealed bearings than the previous generation.
The size of the bearings has also been revised to make them lighter.
| A - Diameter (mm) | B - Width (mm) | Assembly | Standard |
| 34,8 | 68 | screw-on | BSC / BSA |
| 34,8 | 73 | screw-in | BSC / BSA |
| 34,8 | 83 | screw-in | BSC / BSA |
| 34,8 | 100 | screw-in | BSC / BSA |
| 27 | 95,5 | insert | BB 96 (Trek) |
| 41 | 92 | insert | PF 92 |
| 42 | 68 | insert | BB 30 |
| 42 | 73 | insert | BB 30 |
| 46 | 68 | insert | PF 30 |
| 46 | 73 | insert | PF 30 |
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Ref: 7970331000998
Overall rating: 5.0 / 5 from 3 reviews.
Review topics: [].
"Excellent box works very well"
"easy to assemble, good fit remains to be seen over time."
"Very easy to install, even on a 90's bike".