The 105 series contains important trickle-down technology from Shimano's higher tier Ultegra and Dura-Ace components.
The Shimano BBR60 Bottom Bracket contains reliable Shimano bearings and seals that give this bracket a long service life.
1 - Reliable bearings and seals, resulting in increased service life
2 - Reduced size for lightweight
3 - Less friction than other models
Spindle Interface Type: Hollowtech II
BB Shell Width: 70mm