Excessive wear at the center of the tread indicates that the air pressure in the tyre is consistently high. The tyre is riding on the center of the tread and wearing it prematurely. Tyre inflation pressure should always be checked with a reliable tyre gauge. It is always advised to check the air pressure at cold tyre temperature before long run. Always use recommended air-pressure.
This type of wear usually results from consistent under inflation. When a tyre is under inflated, there is too much contact with the road by the outer treads, which wear prematurely. When this type of wear occurs, and the tyre pressure is known to be consistently correct, a bent or worn steering component or the need for wheel alignment could be indicated. Bent steering or idler arms cause incorrect toe-in and abnormal handling characteristics on turns.
May we remind that air is free so, why not feed your tyre aptly?
* Tyre pressure should be checked with a reliable pressure gauge and ensure the tyres are at cold temperature.
If the alignment is incorrect, any number of wear patterns can develop. Additionally, the kind of impact that will bend a tyre will generally also knock the alignment out, creating a tyre wear situation. A 4-point alignment (as opposed to a front-end alignment) essentially ensures that the tyres are all parallel to each other and flat to the pavement, giving the tyres their optimal wear profile.
Broken/Damaged Wheel bearing
Regardless of the position on the vehicle, a worn or loose wheel bearing will result in a severely irregular tread wear pattern. Typically, a series of flat spots appear across the tread face, from shoulder to shoulder, around the circumference of the tyre. They can be straight or diagonal, and may be accompanied by cupping or scallop wear.
Rib depression can also be caused by a worn or loose wheel bearing. In many instances, vehicles with high-speed empty hauls aggravate irregular wear patterns caused by bad wheel bearings.
Flat spots caused by frozen or improperly adjusted brakes are usually easy to recognize. They are relatively uniform and extend evenly across the tread face. In dual applications, the flat spots will be in identical positions on both tyres. This problem will not correct itself in service. In fact, as the tyre “skips” every time it rotates, it creates another flat spot, which eventually covers the entire tyre.
Generally it is seen in new tyres with severe brake skid damage repaired by building up the worn area with extruded rubber, curing the tyre like a retread, buffing it to make it round again, and skiving out the original tread pattern.