WHEELS AND TIRES, RADIAL AND LATERAL RUN OUT, CHECKING WITH Wheel Centering System Adapter VAS5271

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Checking Lateral Run-Out:

-- Mount the wheel on the wheel balancer.

NOTE:

Be careful not to scratch off the glued- on wheel trim on these rims.

The surface of the wheel trim is very sensitive.

The rim will have be replaced if the wheel trim is damaged.

The wheel trim cannot be replaced.

Fig 1: Identifying Wheel Rims With Glued-On Wheel Trim

Courtesy of AUDI OF AMERICA, LLC

-- Use the Wheel Centering System Adapter VAS5271.

-- Preload tire dial gauge approximately 2 mm.

-- Position dial gauge on tire side wall as shown in illustration.

-- Slowly rotate the wheel.

-- Note the smallest and the largest dial readings.

Fig 2: Checking Lateral Run-Out

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If the difference is greater than 1.3 mm, the lateral run-out is too great.

In this case, lateral run-out can be reduced by matched mounting of the tire, refer to MATCHING .

Peak values on the tire dial gauge due to small irregularities in the rubber may be disregarded.

Checking Radial Run-Out

-- Preload tire dial gauge approximately 2 mm.

-- Position dial gauge on tire running surface as shown in illustration.

-- Slowly rotate the wheel.

-- Note the smallest and the largest dial readings.

Fig 3: Checking Radial Run-Out

Courtesy of AUDI OF AMERICA, LLC

NOTE:

If the difference is greater than 1 mm, the radial run-out is too great.

In this case, radial run-out can be reduced by matched mounting of the tire.

NOTE:

If the measured value exceeds the specified value, no acceptable smooth running can be attained.