Reliable Shimano bearings and seals, this bottom bracket has a long service life.
The Shimano Tiagra/Sora bottom bracket uses a new seal construction for long-lasting performance.
The bottom bracket axle is steadily supported by the wide placed bearings on the basis of HOLLOWTECH II technologies providing highly-efficient power transfer.
Shimano Tiagra/Sora Bottom Bracket
Threaded HOLLOWTECH II
Weight: 92 g