Tire Warranty Inspection and Claim Documentation

Tire warranties come in a few types, and each has its own rules. A manufacturing defect warranty covers flaws in materials or workmanship. A treadwear warranty, offered on some tire lines, covers tread that wears out before a stated mileage. Road hazard coverage, for nails and potholes, is usually a separate program. The terms are set by whoever issued the warranty.

We do not promise coverage or an outcome. We read the terms for your tire with you and tell you what the maker asks for.

A claim needs evidence, not a story. We measure tread with a gauge at several points across the tire, photograph the tire and any damage, record the DOT number and note the wear pattern. The last four digits of that DOT number are the build week and year, so 3223 reads as the 32nd week of 2023, and that date sets the clock on the tire. We also check pressure and alignment, because those often come up in treadwear claims.

Our inspection record:

1. Full DOT number and date code
2. Tread depth in 32nds of an inch at the inner, center and outer grooves, in several spots
3. Photos of the tread, sidewalls and any defect
4. Wear pattern, such as even wear or edge wear
5. Current pressure
6. Alignment measurement when treadwear is in question
7. Vehicle mileage

This record is useful even if the claim is denied, because it shows you what caused the problem. See tire wear patterns for what the patterns mean.

Treadwear warranties usually ask for proof that the tires were cared for. Bring the original purchase invoice showing the tire model and install mileage, plus any rotation and alignment records. Missing records can make a claim harder, so keep receipts together from the day the tires go on.

Bring what you have:

• Original tire purchase invoice with mileage
• Rotation receipts
• Alignment printouts. See wheel alignment.
• The vehicle, with the tire still mounted if possible

If you bought the tires from us, we can check our records too. Most manufacturers call for a rotation every 5,000 to 8,000 miles, or at each oil change, so keeping a rotation schedule from the start protects your coverage later.

We explain what we found and whether the tire looks like a warranty candidate under its maker's terms. If it does, we follow the maker's process for submitting the claim. The manufacturer reviews the evidence and decides. If a claim is approved, the terms often provide a prorated credit toward a replacement rather than a free tire. Mileage warranties are settled in 32nds: the tire maker prorates by how much tread is left when the tire reaches 2/32 inch, which is exactly why the measurement has to be documented.

Possible outcomes:

• Approved: credit applied under the maker's terms
• Denied: usually because of road damage, misalignment, underinflation or missing records
• Not eligible: the tire or mileage falls outside the warranty terms

Either way, you leave with the inspection record and a plan. If the tire needs replacing, see new tires and brands.

A manufacturer warranty covers defects in how the tire was made, and some tire lines add a promise about tread life. Road hazard coverage, if you have it, is a separate plan for damage from things on the road, such as nails, glass and potholes. They answer different questions, and each claim goes to a different place.

Every plan has its own terms, so bring whatever paperwork came with your tires. We do not decide the claim, but we measure and document the tire the way the maker asks, so the decision rests on clean evidence.

Tread depth is measured in 32nds of an inch with a gauge, in the main grooves, at several points around the tire. A new passenger tire commonly starts around 10/32 to 11/32 inch and is finished at 2/32 inch, so a mileage claim is a comparison: how many of those 32nds are gone against how many miles were driven. That math only works when the readings are careful and the starting depth is known.

How we take readings:

1. Use the right grooves: the main grooves that run around the tire, not shallow sipes.
2. Measure several spots: inner, center and outer grooves, repeated around the tire.
3. Record the lowest reading: warranties usually go by the most worn point.
4. Note the pattern: even wear supports a claim, while edge or cupped wear points to a maintenance cause.
5. Photograph the gauge in place so the number can be read.
6. Record the odometer the same day.

Wear bars are molded into every tire at 2/32 inch, and NHTSA advises replacing a tire once the tread is worn down to them. Two more numbers matter while a claim is pending. Wet grip falls off well before the wear bars, so 4/32 inch is a common planning point for rain. And California Vehicle Code 27465 sets the legal floor lower still, at 1/32 inch in any two adjacent grooves on a passenger car, so a tire can be street legal and already past the point where it works in rain. The NHTSA tire page (opens in a new tab) covers tire safety basics. If uneven wear turns up, our wear patterns guide explains what each shape usually means.