Chevrolet Sonic Repair Manual: Tire and Wheel Assembly-to-Hub/Axle Flange Match-Mounting

Chevrolet Sonic Repair Manual / Chassis / Wheels/Tires / General / Tire and Wheel Assembly-to-Hub/Axle Flange Match-Mounting

Note:

After remounting a tire and wheel assembly to a hub/axle flange, remeasure the tire and wheel assembly on-vehicle runout in order to verify that the amount of runout has been reduced and brought to within tolerances.

Mark the location of the high spot on the tire and wheel assembly as determined during the on-vehicle tire and wheel assembly runout measurement.
Place a reference mark on the wheel stud that is located closest to the wheel valve stem.

Always refer to the reference mark on the wheel stud as the 12 o'clock position.
Refer to the location of the high spot by its clock position on the tire and wheel assembly, relative to the marked wheel stud.

Remove the tire and wheel assembly from the hub/axle flange. Refer to Tire and Wheel Removal and Installation.

Rotate the tire and wheel assembly as close to 180 degrees as possible on the hub/axle flange, so that the wheel valve stem is now approximately at the 6 o'clock position in relation to the marked wheel stud.

Reinstall the wheel lug nuts to secure the tire and wheel assembly in the new position. Refer to Tire and Wheel Removal and Installation.

Remeasure the tire and wheel assembly on-vehicle runout. Mark the new location of the assembly on-vehicle runout high spot on the tire. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle.

If the assembly on-vehicle runout has been reduced and is within tolerance, no further steps are necessary.

If the assembly runout has NOT been reduced, perform the following steps:

If the clock location of the high spot remained at or near the original clock location of the high spot, the hub/axle flange and/or the brake rotor/drum mounting flange is the major contributor to the assembly on-vehicle runout concern.
If the clock location of the high spot is now at or near a position 180 degrees from the original clock location of the high spot, the tire and wheel assembly is the major contributor to the assembly on-vehicle runout concern.
If the clock location of the high spot is now in-between the 2 extremes, then both the tire and wheel assembly and the hub/axle flange are contributing to the assembly on-vehicle runout concern. Rotate the tire and wheel assembly as close to an additional 90 degrees as possible in both the clockwise and the counterclockwise directions to obtain the lowest amount of assembly on-vehicle runout.

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