Matching Wheels And Tyres - Seat Leon 2013 Workshop Manual

León 2013 ➤ , León ST 2013 ➤
Running gear, axles, steering - Edition 06.2018
– Make a note of the smallest and largest deflection of the indi‐
cator needle.
S - Lateral runout
H - Radial runout
– Compare the measured value determined with the theoretical
values in the table ⇒ page 318
Note
Ignore the one-off peak measurements on the micrometer caused
by the elevation or depression of the material.
Specifications for radial and lateral runout on wheel
Rim
Passenger Steel wheel rims
vehicles
Light alloy wheel
rims
Van Steel wheel rims
Light alloy wheel
rims
Note
If the measured value exceeds the specification, acceptably
smooth running cannot be attained.
2.7

Matching wheels and tyres

General information
When radial or lateral runout of the wheel and tyre coincide, the
imbalance of the wheel is amplified by the tyre.
For technical reasons, 100% true running is not possible
⇒ page 316 .
Before match mounting the used wheels which are fitted on the
vehicle, run the tyres warm. By doing this you will eliminate any
existing flattening ⇒ page 319
Match balancing process
– Let air out of tyre.
– Press tyre beads off wheel rim flanges.
– Apply tyre assembly paste all round the tyre beads.
– Rotate tyre by 180° in relation to disc wheel.
– Pump up tyre to approx. 4 bar.
– Attach the wheel (together with tyre) to the wheel balancing
machine.
– Check wheel for true running and for radial and lateral runout .
318
Rep. gr.44 - Wheels, tyres, vehicle geometry
.
Radial run-out (mm)
0.5
0.5
0.5
0.5
.
Axial run-out (mm)
0.5
0.8
0.8
0.5