GSP9700 Series Road Force Measurement System Operation 3. Mounting Wheels on the Balancer 33
3.3 On-Vehicle Wheel Mounting Methods
Hub Centric
A hub centric wheel is aligned to the hub by the center bore of the wheel. The vehicle
weight rests on the hub bore. The clearance between the hub bore and the hub on a
hub centric wheel is between 0.003 and 0.004 of an inch. A hub centric wheel is
identified by removing the lug nuts (or bolts) and moving the wheel up, down, and
side-to-side. If there is little or no movement, the wheel is centered by the hub.
To verify if the wheel is hub centric:
Remove the lug nuts (or bolts) and try to move the wheel up/down and
side/side on the hub.
If the wheel has no appreciable movement around or about the
centerline of the hub, it should be considered hub centric.
A hub centric wheel will have very little (0.003 – 0.004”) clearance or a
slip fit to the hub.
Lug Centric
A lug centric wheel is identified by removing the lug nuts (or bolts) and moving the
wheel up, down, and side-to-side. If movement around the hub is apparent, the wheel
is centered on the vehicle by the lugs or studs of the axle flange.
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