Cupping below article/pic
[:-]

Checking Tire Tread
There are two popular ways for checking to see if there is enough tread on your tires. All passenger, light truck, and medium commercial tires have tread wear indicator bars molded into the tread. These bars are located at the bottoms of the tread grooves in several locations around the tire, and when the tire is worn to the point where any of them become visibly flush with the adjacent tread ribs, it is time to replace the tire. Another easy way to check that your tire has enough tread remaining is to place a penny in the tread with Lincoln's head upside down and facing you. if you can see the top of Lincoln's head it is time to replace your tires.



Wear On Both Edges: UNDER INFLATION[/b] If a tire looks like this, it may be under inflated. The worst enemy a tire can have is too little inflation pressure. Under inflation reduces treadlife through increased tread wear on the outside edges (or shoulders) of the tire. It also generates excessive heat which reduces tire durability. Finally, it reduces fuel economy through increased rolling resistance (soft tires makes your vehicle work harder). Check your tires regularly for proper inflation. Abnormal tire wear may also be due to misalignment or mechanical problems. Many [/b]Goodyear retailers can provide expert diagnosis and repair.

Wear In Center: OVER INFLATION When a tire is over inflated, the center of the tread bears most of the load and wears out faster than the outside edges. Uneven wear reduces the useful life of a tire. Check your tires regularly for proper inflation. Abnormal tire wear may also be due to misalignment or mechanical problems. Goodyear retailers can provide expert diagnosis and repair.

[/b]

Cups or Dips in the tread: WORN PARTSCupping (also called dipping or scalloping) is most common on front tires, though rear tires can cup as well. It may be a sign that wheels are out of balance or that suspension or steering system parts are worn out. Many Goodyear retailers can provide expert diagnosis and repair.

[/b]

Sawtooth edges: MISALIGNMENT Do the edges of the tread take on a sawtooth or feathered appearance? This is caused by erratic scrubbing against the road. The solution is toe-in or toe-out alignment correction.

[/b]