
The bottom bracket axle is steadily supported by the wide placed bearings on the basis of HOLLOWTECH II technologies providing highly-efficient power transfer.
With an advanced seal construction for smoother rotation, the DURA-ACE is still lightweight at 54 grams.
With an advanced seal construction for smoother rotation, the DURA-ACE is still lightweight at 54 grams.
BENEFIT
Bottom bracket with small ball bearings for lightweight
BENEFIT
Advanced seal construction for smoother rotation
BENEFIT
Weight: 65g (SM-BB9000) 54g (SM-BB92-41B)