Key takeaways
- 2/32" tread depth is the legal minimum — most drivers should replace at 4/32".
- Six years is a reasonable outer age limit, even for tires with good tread.
- Uneven wear usually points to alignment or inflation issues, not just the tire itself.
- Cracking, dry rot, and bulges mean replace now — regardless of tread.
Check tread depth the right way
The classic penny test — insert Lincoln head-down into the tread groove — flags 2/32", the legal minimum. A quarter (Washington head-down) flags roughly 4/32", where wet-weather stopping distances start climbing sharply. Most technicians recommend planning replacement at 4/32".
Check across the width of the tire, not just the center. Wear that's heavier on one edge signals alignment or pressure problems that a new tire alone won't fix.
Watch the calendar, not just the tread
Rubber ages even when a tire looks fine. Most manufacturers recommend replacement by 6–10 years from the DOT date code on the sidewall, regardless of remaining tread. Southern California sun and heat cycles push tires toward the shorter end of that range.
Damage that always means replacement
Sidewall bulges, cuts to the cord, chunking, exposed steel belts, or persistent slow leaks that can't be traced to a valve stem — all replacement cases. If you're not sure, our roadside technicians can inspect and give you an honest recommendation before you drive.
Frequently asked questions
Do I need to replace all four tires at once?
Not always. All-wheel-drive vehicles typically require matching tread depths across all four tires. For 2WD vehicles, replacing in pairs (on the same axle) is a common minimum.
Can Go Ape deliver and install a new tire at my house?
Yes. Our mobile tire replacement service brings a new tire to your driveway or roadside location and installs it on the spot.