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Wheels and Tires
Tire Wear Diagnostic Chart
Wear Pattern Cause Action
Center Wear
Over Ination
Adjust pressure to
particular load per tire
catalog
Edge Wear
Under Ination
Adjust pressure to
particular load per tire
catalog
Side Wear
Loss of camber or
overloading
Make sure load doesn’t
exceed axle rating. Align
at alignment shop
Toe Wear
Incorrect toe-in Align at alignment shop
Cupping
Out-of-balance
Check bearing adjustment
and balance tires
Flat Spots
Wheel lockup &
tire skidding
Avoid sudden stops when
possible and adjust
brakes
CAUTION
Tire wear should be checked frequently. Once a wear pattern
becomes firmly established in a tire it is difficult to stop, even if the
underlying cause is corrected.
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