How to Interpret Tire Wear 

Step 4 will make the problem worse on a modern tire. The old "Over inflation wears the centre." Is something Grandad had to worry about with his bias ply tires but not something we have to worry about with steel belted tires. You wont be able to over inflate a steel belted tire to cause it to curve that much. This type of wear is common on high torque RWD, AWD and 4WD rear tires. Letting air out will only make the problem worse!