Symptoms
- Tires look visibly different from each other
- One or two tires were replaced individually over time
- Handling feels slightly different side to side or front to back
Likely causes
- CommonTires replaced individually rather than as a setMany people replace only the tire that fails, leading to a mix of ages and tread designs.
- PossibleSpare or used tire installed temporarily and left onA mismatched tire from a repair or used purchase sometimes stays on longer than intended.
What to do
- Check the size, brand, and tread pattern of all four tires to see how mismatched they are.
- If tires only differ slightly in tread depth (within about 2/32 inch), it's generally acceptable.
- On all-wheel drive vehicles, be more cautious: even small size differences can strain the drivetrain over time.
- Prioritize matching tires on the same axle first, since a mismatch side to side is more noticeable than front to back.
- Plan to replace toward a matching set, especially before winter or on AWD vehicles.
Tools and parts
Matching tire in your sizeSearch: “tire size for [your car model]”
When to call a pro
On an AWD vehicle with significantly mismatched tires, have a shop check for potential drivetrain strain and get guidance on safe tire differences.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.