VW Polo manuals

Volkswagen Polo Service & Repair Manual: Tire Wear, Center

This wear pattern is found on drive wheels on high-powered vehicles that often drive long stretches at high speed.
At high speeds, the centrifugal force increases the tire diameter at the center of the tread more than at the shoulders of the tire. The drive forces from the center area of the tread are transferred to the road surface. This is reflected in the wear pattern.
These effects can appear especially extreme on wide tires.
Reducing the Tire Pressure is Not an Effective Remedy for this Wear Pattern.
  WARNING
For safety reasons, tire pressure must never be lowered below specified pressure under any circumstances.
A largely even wear pattern can be achieved if tires are changed in a timely manner from the tractive to the non-tractive axle.
   
Increased Tread Wear
Typical wear pattern of tires on the tractive axle of high-powered vehicles.
The increased wear at the tread center is caused by stresses related to the centrifugal force of the tire and the transmission of traction forces.
 

Tire Wear, Center

Diagonal Washouts
Diagonal wear spots on tires Diagonal wear spots run at an angle of approximately 45° with respect to the plane of circumference. ...

Permitted Tread Depth - Variance
For all four wheels use only tires of the same construction type, and tread. Always use tires with the deepest tread depth on the front a ...

Other materials:

Vehicle lifting points
Fig. 150 Lifting points at front for the lifting platform or vehicle jack Fig. 151 Lifting points at rear for the lifting platform or vehicle jack First read and observe the introductory information and safety warningsThe vehicle may only be lifted at the points shown in the illustration ...

Contaminants Removed from Refrigerant Circuit
The reservoir/receiver/dryer or dryer bag/cartridge should not be replaced under the following conditions. After an accident when there is no damage on the reservoir/receiver/dryer. The repair was done quickl ...

Electrically Driven A/C Compressor, Flushing
Vehicles with a high voltage system Observe all of the additional warnings for all work performed on vehicles with the high voltage system. Refer to → Electrical Equipment; Rep. Gr.93.   ...

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