Shimano Ultegra SM-BBR60 Bottom Bracket
Shimano has lightened up their Ultegra Bottom Bracket with the SM-BBR60. Lighten up with the an Ultegra BBR60 Bottom bracket. This BB features a proprietary seal system which reduces friction by 50% letting you spin faster and more consistently.
- Available in both English or Italian threads
- Compatible with all HollowTech II cranks
- 77 grams is super light