What Causes Uneven Tire Wear (And How to Fix It)

Tires wear out. But the pattern of that wear tells a very specific story. Uneven wear almost always points to a correctable problem — and the earlier you catch it, the less it costs to fix.

Center Wear: Tires Overinflated

When the center of the tread wears faster than the edges, your tires are carrying too much air pressure. Overinflated tires balloon outward, concentrating contact on the center strip. Check your door jamb sticker for the correct cold inflation pressure — not the "max" number on the tire sidewall, which is the tire's maximum rating, not your vehicle's recommended pressure.

Edge Wear: Tires Underinflated

Wear on both edges (shoulders) while the center tread remains suggests the tire is running underinflated. The sidewall sags outward under load, putting more contact pressure on the outer edges. Check inflation when tires are cold — pressure drops about 1 PSI for every 10°F drop in temperature.

One-Sided Edge Wear: Camber Misalignment

If one edge wears significantly faster than the other, camber angle is the likely cause. Camber is the inward or outward tilt of the tire when viewed from the front. Positive camber (tilting out) wears the outer edge; negative camber (tilting in) wears the inner edge. A wheel alignment corrects this.

Feathering: Toe Misalignment

Feathering looks like the tread blocks are worn down on one side and rounded on the other, creating a rippled or sawtooth pattern when you run your hand across the tread. It's caused by toe misalignment — the tire pointing slightly inward (toe-in) or outward (toe-out) relative to the direction of travel. A 4-wheel alignment corrects toe.

Cupping or Scalloping: Worn Shocks or Struts

Scalloped or cupped wear looks like the tread has been scooped out in patches at regular intervals around the tire. It's caused by a bouncing motion — the tire literally hops as it rolls, hitting harder in some spots than others. This points to worn shocks or struts that are no longer dampening suspension movement properly. Continuing to drive on scalloped tires causes vibration and accelerates suspension wear.

Patchy or Diagonal Wear: Balance Issues

Irregular or diagonal wear patches across the tread — different from cupping — can indicate tire balance problems or a bent wheel. Rotate and balance tires to see if the wear pattern stabilizes. If a specific wheel consistently develops these patterns, the wheel itself may be damaged.

How to Prevent Uneven Tire Wear

• Rotate tires every 5,000–7,500 miles
• Check inflation monthly — cold, in the morning
• Align after hitting significant potholes or curbs
• Replace shocks and struts when they show wear (typically 50,000–80,000 miles)
• Balance tires when you feel vibration or at each rotation interval