Matched Mounting

Matched Mounting

General Information

If radial or lateral run-out from wheel or tire meet each other, the untrue running of the wheel and tire is increased.

For technical reasons, 100% true running is not possible. Refer to => [ Wheels and Tires, Radial Lateral Run Out ] Wheels and Tires, Radial Lateral Run Out.

Drive the tires until they are warm before matching them to the tires already on the vehicle. This eliminates flat spots from standing which may exist. Refer to => [ Flat Spots in Tires from Standing ] Flat Spots In Tires From Standing.

Work Procedure for Match-Mounting

- Let the air out of the tire.

- Press the tire beads off the rim flanges.

- Coat the tire beads all around with tire mounting paste.

- Rotate the tire 180° relative to the disc wheel.

- Inflate the tire to approximately 4 bar.

- Tension wheel with tire on balancing machine.

- Check the run-out or the radial and lateral run-out, as necessary.

• If the radial and lateral run-out value is not exceeded, the wheel can be balanced to 0 grams. Specifications, refer to => [ Tolerances for Radial and Lateral
Run-Out of Disc Wheel with Tire ] Wheels and Tires, Radial Lateral Run Out.

• If the radial and lateral run-out lies outside the specified values, the tire must be turned again.

- Let the air out of the tire and press the tire beads off the rim flanges.

- Rotate the tire 90° (one quarter turn) relative to the disc wheel.

- Inflate the tire to 4 bar and check for true running.

• If the radial and lateral run-out value is not exceeded, the wheel can be balanced to 0 grams.

• If the radial and lateral run-out is still outside the specified values, the wheel must be turned again.

- Press the tire beads off the rim flanges.

- Rotate the tire 180° (one half turn) relative to the disc wheel.

If the values for radial or lateral run-out are still outside the specified values, check the wheel for radial and lateral run-out. Refer to => [ Disc Wheel, Checking Radial and Lateral Run Out ] Disc Wheel, Checking Radial and Lateral Run Out.

If the measured values for radial and lateral run-out of the wheel disc are within the specified values, then the tire has excessive radial or lateral run-out. In this case, the tire must be replaced.

• Assembly paste from mounting tires is located between tires and rim flanges.

• Avoid strong braking or acceleration maneuvers during the first 100 to 200 km. Otherwise, the tires can rotate on the rims and the work done would then be undone!