TIRE PRESSURE
It's important to have the proper inflation pressure in your tires, as under inflation can lead to tire failure. The "right amount" of inflation for your tires is specified by the vehicle manufacturer and is shown on either the vehicle door edge, door post, glove box door or fuel door. It is also listed in the owner's manual.

ALIGNMENT
Misalignment of wheels in the front or rear can cause uneven and rapid treadwear and should be corrected by a tire dealer. Front-wheel drive vehicles, and those with independent rear suspension, require alignment of all four wheels. Have your alignment checked peridically as specified by the vehicle owner's manual or whenever you have an indication of trouble such as pulling. Also have your tire balance checked periodically. An unbalanced tire and wheel assembly may result in irregular wear or vibration.

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Maintain Correct Pressure- Under inflation or overloading creates excessive stress and heat, and can lead to tire failure. This could result in vehicle damage and/or serious injury or death. An over inflated tire can cause uneven wear in the center of the tread. Over inflation also can make the tire more susceptible to road hazard damage and pose vehicle handling issues.

ROTATION
Sometimes irregular tire wear can be corrected by rotating your tires. Consult your vehicle owners manual, the tire manufacturer or your tire dealer for the appropriate rotation pattern for your vehicle. Before rotating your tires, always refer to your vehicle manual for rotation recommendations. If no rotation period is specified, tires should be rotated approximately every 5,000-8,000 miles.

TREAD
Tires must be replaced when the tread is worn down to 2/32 of an inch. Traction, particularly in bad weather, and resistance to hydroplaning is reduced as tires wear. An easy test; place a penny into a tread groove. If part of Lincoln's head is covered by the read you've driving with the proper amount of tread. If you can see of all of his head, you should buy a new tire.
Built in treadwear indicators, or wear bars which look like narrow strips of smooth rubber acrocss the tread will appear on the tire when the tread is worn down to 2/32 of an inch. When the top of the wear bars are flush with the tire tread, the tire is worn out and needs to be replaced.
Check your tires for signs of uneven wear. You may have irregular tread wear if there are high and low areas or unusally smooth areas.