Dual Rear Wheels (DRW)

Wheels And Tires


Component Tests

Wheel-to-Hub Optimization

Wheel-to-hub optimization is important. Clearance between the wheel and hub can be used to offset or neutralize the Road Force(R) or run-out of the wheel and tire assembly. For every 0.001 inch of wheel-to-hub clearance, the Road Force(R) can be affected between 1 and 3 pounds depending on the tire stiffness.

NOTE: The example below illustrates how the clearance between the wheel and the hub can be used to offset the high spot of radial run-out or Road Force(R). Following the procedure will make sure of the best optimization.






Dual Rear Wheels (DRW)

NOTE: The valve stem on the inner and outer assemblies will most likely not align through the same window. Although the valve stem of the inner assembly may not be as easy to locate, it is still possible to put air in the inner assembly without removing the outer assembly. The customer should be informed of the valve stem position and the reason for the alignment.

NOTE: Road Force(R) values in illustrations are shown in pounds.

1. Add the Road Force(R) values recorded on the inner and outer wheel and tire assemblies (one side). If the total is less than 32 kg (70 lb), install the assemblies in the following order.

1. Position the inner wheel and tire assembly on the vehicle so that the high spot location is at the 12 o'clock position.

2. Position the outer wheel and tire assembly on the vehicle so that the high spot location is at the 12 o'clock position.

3. Tighten the wheel nuts as described in Wheel and Tire - Dual Rear Wheel (DRW) Wheel and Tire - Dual Rear Wheel (DRW).





2. If the total Road Force(R) values are greater than 32 kg (70 lb) and the inner assembly has a higher value, install the assemblies in the following order.

1. Position the inner assembly on the vehicle so that the high spot location is at the 12 o'clock position.

2. Position the outer assembly on the vehicle so that the high spot location is at the 6 o'clock position.

3. Tighten the wheel nuts as described in Wheel and Tire - Dual Rear Wheel (DRW) Wheel and Tire - Dual Rear Wheel (DRW).





3. If the total Road Force(R) values are greater than 32 kg (70 lb) and the outer assembly has the higher value, install the assemblies in the following order.

1. Position the inner assembly on the vehicle so that the high spot location is at the 6 o'clock position.

2. Position the outer assembly on the vehicle so that the high spot location is at the 12 o'clock position.

3. Tighten the wheel nuts as described in Wheel and Tire - Dual Rear Wheel (DRW) Wheel and Tire - Dual Rear Wheel (DRW).