Uneven Tire Wear
Tires that wear unevenly across the tread are telling you something is wrong. The wear pattern itself is a diagnostic tool — each type points to a different cause, from under-inflation to a worn suspension component.
Can I Drive?
Yes, but fix the underlying cause now. Uneven wear shortens tire life dramatically — a tire that should last 50,000 miles might need replacement at 20,000 if the cause is ignored.
Most Likely Causes
- 1
Incorrect tire pressure
Under-inflation causes wear on both edges (shoulders carry the load). Over-inflation causes wear in the center tread only. Both are visible at the same time.
The single most common and most preventable cause of premature tire wear.
- 2
Misaligned wheels
Excessive toe-in or toe-out causes feathering (feeling the tread ribs with your hand — they'll feel sharp in one direction). Excessive camber causes one-sided edge wear.
Toe wear is the most common alignment-related wear pattern.
- 3
Worn shock absorbers or struts
Worn shocks can't keep the tire firmly on the road during suspension travel. The tire bounces and skips, creating cupping or scalloping wear.
Bounce test: push down on each corner of the car. Should settle in one bounce. Multiple bounces = worn shocks.
How to Diagnose It
- 1
Run your hand across the tread in both directions. If the blocks feel sharp in one direction and smooth in the other (like fish scales), toe misalignment is the cause.
- 2
Look at the tire from the front. If the tire leans noticeably inward or outward at the top, camber is out of spec.
How to Fix It
Incorrect tire pressure
Set all four tires to the pressure on the door jamb sticker. Check monthly. New tires won't fix the wear pattern but will start fresh if the pressure is now correct.
Misaligned wheels
Shop recommendedAlignment is a shop job requiring a four-wheel alignment rack. Cost: $80–$150. Also rotate tires every 5,000–7,500 miles to even out wear.
Parts & Tools
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Mistakes to Avoid
- Don't buy new tires without fixing the underlying cause — they'll wear the same way.
- Don't skip tire rotations — they're the cheapest wear-prevention maintenance you can do.