Increased lateral wear
Lateral wear, most often in combination with rib wear and fine cuts, always occurs when tires operate at an extremely high slip angle and therefore «tinder» by road surface (pic. 4.6).
Fast driving on cornering areas leads to increased wear in particular on the outer shoulders of the tire.
The rounded outer shoulder of the tire, together with a high degree of wear on the outer tread blocks, indicates fast cornering. This wear is due to the appropriate driving style.
To optimize driving performance, the chassis is adjusted to specific toe and camber parameters. If the tires are operated under conditions other than those specified, one-sided and increased wear must be considered.
Particularly incorrect parameters of the RPW can lead to greater one-sided wear, in addition to this, the risk of uneven wear increases.
Negative convergence
The distance between the wheels in front - A is greater than the distance B in the back (C direction of travel).
Convergence or positive convergence
The distance between the wheels in front A is less than the distance B in the back (C direction of travel).
To avoid one-sided tire wear, ensure that wheel alignment is always within the manufacturer's tolerance. Most often, the wheel alignment angles deviate from the nominal parameters due to external influences, such as hard contact with the curb when parking.
With RUUK, it is possible to determine whether the wheel alignment angles are within tolerance or if they need to be adjusted.
Chassis changes
Usage «shortened spring kit» and/or alloy wheels not approved by VW may result in wheel alignments that differ from those designed.
Even if the wheel alignments are normal during RVK when the vehicle is stationary, the movement of the wheel suspension may change due to the changed height and position of the wheels while driving.
Thus uneven wear is pre-programmed.
Wear of the central part of the tread
This wear pattern occurs on the drive wheels of vehicles with powerful engines that often travel long distances at high speeds.
At high speeds, the tire diameter due to centrifugal force increases in the middle of the tread more than at the edges. As a result, the driving force is transferred to the roadway from the middle part of the tread. This fact is reflected, in turn, in the nature of wear.
This wear is especially noticeable on wide tires.
By lowering the air pressure in the tires, this wear cannot be avoided.
WARNING: For safety reasons, under no circumstances should the air pressure in the tires be lower than prescribed.
More or less uniform wear can be achieved by timely rearrangement of the wheels from the drive axle to the non-drive axle.
Increased tread wear
Typical wear pattern of tires mounted on the drive wheels of a vehicle with a powerful engine (pic. 4.9).
Greater wear of the middle part of the tread of tires is a consequence of the loads arising from the centrifugal force of the tire and the transfer of driving force to the road surface.
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