Tests to assure the spoke-hole angles have been drilled precisely at predetermined position and angle.
The rim is fixed in a testing device and rotated while a gauge measures the exact position and angle of the spoke holes. Each hole must be drilled to exact specification.
At Bola Wheels, we drill our holes at the precise angle at which the spoke must travel to the hub. The more accurate the spoke-hole angle is the less tension on the spoke, which results in a more reliable true and less spoke breakage. This means lower maintenance and a better ride.