Bottom bracket Shimano DURA-ACE SM-BB92-41B
Bottom bracket with small ball bearings for lightweight
Advanced seal construction for smoother rotation
Weight: 54 g
Shell Width: 86mm
BB shell diameter: 41 mm
HOLLOWTECH II BB - outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.
Press-Fit BOTTOM Bracket - to meet customer needs in the best possible way, SHIMANO has developed the press-fit bottom bracket, staying focused on our final goal: total performance in pedaling. The bottom bracket axle is steadily supported by the wide placed bearings on the basis of HOLLOWTECH II technologies providing highly-efficient power transfer.