Wheel to Tire Runout Minimization

Step 7

1. First high spot on the tire

2. Second high spot on the tire

8. To be SURE that the tire is causing the high runout, it is necessary to have 2 runout or Road Force® measurements that are not within specification and the high spots must be in approximately the same location on the tire's sidewall. If the tire is the cause, install a new tire, balance the assembly and install on the vehicle using the Wheel-to-Hub Optimization procedure. If the second high spot is not within 101.6 mm (4 in) of the first high spot, proceed to the next step.

9. If the second high spot is still above specification and is within 101.6 mm (4 in) of being opposite the first high spot on the wheel, the root cause is probably the wheel (the high spot followed the wheel). Dismount the tire from the wheel, mount the wheel on a balancer and check the wheel runout. If the wheel runout exceeds 1.14 mm (0.0449 in), install a new wheel, balance the assembly and install on the vehicle using the Wheel-to-Hub Optimization procedure. Refer to: Wheel to Hub Runout Minimization (204-04A Wheels and Tires, General Procedures).

Step 10

1. First high spot on the tire

2. Second high spot on the tire

11. NOTE: If the second high spot did not follow the wheel or the tire and the runout is still not within specification, improvements may be made by rotating the tire 90 degrees (one-fourth turn).

Draw an arrow on the tire sidewall from the second high spot towards the first high spot (in the shortest direction).

Step 12

1. First high spot on the tire

2. Second high spot on the tire