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478 WHEELS AND TYRES TYRE DIAGNOSIS Tyre Wear Patterns It is essential to check tyre regularly for wear, cracking, bulging, tyre pressure or objects embedded in thread. Following are the few tyre wear patterns and their probable causes which can affect the performance and safety of the car. Excessive wear on shoulders or outer edges Excessive wear on centre section Excessive wear on one side of thread Feathered or saw-tooth thread Under inflation, high speed cornering Over inflation Excessive camber Incorrect toe-in WEAR PATTERN CAUSES