Here are some easy ways to check what is causing unusual wear on your tires. UNDERINFLATION - Wear on both edges caused by excessive heat being generated from increased friction. OVERINFLATION - Wear in the center. WORN PARTS - Cups or dips in the tread. Most common on front tires. MISALIGNMENT - Misalignment causes erratic scrubbing against the road giving the tire's edges a sawtooth-like appearance. If you have questions about tire wear on your vehicle why not stop into Tires Now (conveniently located inside the Jiffy Lube at 84 King George Rd) and talk to one of our tire professionals. They will tell you whether excessive wear is jeopardizing your safety . They will also answer any questions you may have about tire care and preventive maintenance. We look forward to seeing you.