G5 Ceramic Bearing

The ceramic bearings utilize G5-grade ceramic balls and are

paired with precisely machined steel race, delivering excellent rotational

performance for riders.

P05 Steel Bearing

The P05 precision steel ball bearings, for reassuringly high

smoothness and durability. 0.005 mm for eccentricity (out of roundness) of the

track in the inner race. That´s precise.