Session BSA Bottom Bracket with Ceramic Bearings 29mm Axle (DUB)

BSA Session Central with G5 ABEC5 Ceramic Bearings

Central compatible with BSA system frames or English thread with 29MM or DUB axle.
Axles: 29mm (DUB)

A central crankset can fit all crankset models on the market.

Hub used in new Specialized Bikes.

Abec5 Ceramics

Ceramic bearings utilize G5 grade ceramic balls and are combined with a precision machined steel race, providing excellent rotational performance for cyclists. 


P05 precision steel ball bearings for reassuringly high smoothness and durability. 0.005 mm for raceway eccentricity (out of roundness) on the inner race. 
This is precision