How to Read Your Tire Wear Patterns: What Uneven Wear Is Telling You
Tire wear is not simply a function of mileage — it is a diagnostic record of how the tire has been operating, what inflation pressure it has been running at, and whether the vehicle’s alignment and suspension are within specification. A tire worn primarily on the outside edge tells a different story than one worn in the center, which is different from one worn on both edges, which is different from a cupped or scalloped wear pattern. Understanding what each wear pattern indicates allows you to address the root cause rather than simply replacing the tire and experiencing the same wear pattern on the new one.
Center Wear: Overinflation
A tire worn primarily in the center tread area with less wear on the outside edges was operated at excessive inflation pressure. Overinflated tires balloon in the center, causing the center tread to carry more of the contact patch load. The fix is reducing inflation to the vehicle’s specified pressure — the sticker in the driver’s door jamb, not the maximum pressure on the tire sidewall.
Edge Wear: Underinflation
A tire worn on both outside edges with good tread remaining in the center was underinflated. Underinflated tires collapse in the center and distribute load to the edges. Both edges wearing simultaneously (as opposed to one edge only) is the indicator that distinguishes underinflation from alignment problems. The fix is maintaining correct inflation pressure consistently.
One-Edge Wear: Alignment Problem
A tire worn significantly more on one edge — inside or outside — than the other indicates an alignment problem. Inside edge wear typically indicates excessive negative camber (the top of the wheel angled inward). Outside edge wear indicates excessive positive camber or worn suspension components allowing the wheel to change camber under load. One-sided wear requires a wheel alignment inspection, and potentially suspension component replacement, before new tires will wear normally.
