Tire Wear on both edges
The problem may be
Your tires may give you clear signs of wear problems in time to have them
corrected before they cause permanent damage to the tires. You can prevent wear
problems that shorten tire life by thousands of miles by learning to "read" the
early warning signs & taking appropriate corrective action.
Wear On Both Edges: If your tire looks like this, it may be underinflated. Not
having enough air in a tire is singly the worst thing you can do to a tire.
Underinflation reduces treadlife through increased tread wear on the outside
edges (or shoulders) of the tire. It also generates excessive heat which reduces
tire durability & can lead to tire failure. 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 caused by misalignment or mechanical problems.