Symptoms
- Tires wear unevenly even with correct pressure and regular rotation
- Wear pattern is isolated to one specific tire or corner
- Other suspension symptoms present, like clunking or a pull
Likely causes
- CommonWorn ball joint or control arm bushing changing wheel alignment under loadAs these parts wear, the wheel's effective camber or toe can shift, especially under braking or cornering.
- PossibleWorn strut or strut mount allowing extra wheel movementA failing strut lets the tire contact patch shift more than it should, wearing unevenly.
- PossibleBent suspension component from a past impactA bent control arm or strut can permanently misalign that wheel even after an alignment.
What to do
- Rule out simple causes first: confirm tire pressure is correct and rotation has been done regularly.
- Look closely at which specific tire has unusual wear and in what pattern (inside, outside, cupping).
- Have a mechanic check the alignment and specifically inspect suspension components for play or bending, not just adjust the alignment numbers.
- Replace any worn or bent suspension component found before or alongside a new alignment.
- Replace the affected tire if wear is severe enough to compromise safety or tread life.
Tools and parts
Control arm or ball jointSearch: “control arm for [your car model]”
When to call a pro
If an alignment alone doesn't stop the uneven wear from recurring, have the shop look specifically for worn or bent suspension parts rather than just re-aligning repeatedly.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.