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 Bent axle beam Wheels and Tyres 10
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