The wheels are sorted by mold number, and any defective wheels are discarded.
Wheel bores are reamed and bored perfectly round and smooth.
Outer hub faces are coned to minimize contact with the axle head.
The wheel tread is lathed with True Track to achieve a perfectly round wheel, a flat tread surface, and a slight radius on the edges to replicate the look of a stock BSA wheel.
Round and smooth wheels roll faster than standard wheels.
Matched mold numbers ensures that the bore diameter and other wheel measurements are identical, maximizing performance.