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WHEELS AND TYRES
8
C. WEAR CAUSES
PROBLEM
CAUSE
PATTERN
Shoulder Wear
Both Shoulders wearing
faster than the centre of the
tread
Under-inflation
Repeated high-speed cornering
Improper matching of rims and tyres
Tyres haven't been rotated recently
Centre Wear
The centre of the tread is
wearing faster than the
shoulders.
Over-inflation
Improper matching of rims and tyres
Tyres haven't been rotated recently
One side wear
One side of the tyre wearing
unusually fast.
Improper wheel alignment
(especially camber)
Tyres haven't been rotated recently
Spot wear
A part (or a few parts) of the
circumference of the tread
are wearing faster than other
parts.
Faulty suspension, rotating parts or brake parts
Dynamic imbalance of tyre/rim assembly
Excessive run out of tyre and rim assembly
Sudden braking and rapid starting
Under inflation
Feather-edged wear
The blocks or ribs of the
tread are wearing in a
feather-edge pattern
Improper wheel alignment
(faulty toe-in)
Bent axle beam