Treadwear vs. mileage · guide
Treadwear rating vs. mileage warranty
Two different promises
- Treadwear (UTQG) compares a tire’s wear rate with a control tire on a government course (explained here).
- Mileage warranty is the maker’s commitment against “wearout”. Continental defines wearout as tread “worn evenly down to the tread wear indicators (2/32 in. or 1.6 mm remaining)” and adds that “actual mileage may vary based on driving habits, vehicle type, and road conditions” (Continental Tire support).
What a warranty claim involves (one maker’s published terms)
These are Continental’s terms from its support article; other makers differ, so read your own paperwork.
- Pro rata, not free replacement: “Pro-rata means the replacement cost is calculated based on the percentage of mileage actually received compared to the warranty mileage.” Continental’s own example: 45,000 miles received on a 60,000-mile warranty is 75%, so you pay 75% of the replacement tire price, plus taxes, shipping, mounting, balancing and disposal or service fees.
- Proof: the original receipt, a completed rotation schedule, and tires worn to 2/32 inch.
- Conditions: rotation every 6,000–8,000 miles; staggered fitments that can’t be rotated get 50% of the standard mileage on the rear axle; tires in service longer than 72 months are not covered; original-equipment tires are excluded.
So a warranty’s headline miles are an upper bound on what the maker will stand behind, not an estimate of what you’ll get. See how to turn it into a number in the cost-per-mile guide.
Matching warranty to treadwear: the numbers don’t line up
Continental publishes warranty miles by speed rating on one page, and NHTSA publishes treadwear grades by line. We matched the line names by hand; NHTSA’s grade is a line-level range (it varies by size), and Continental’s warranty varies by speed rating, so both are shown as ranges.
| Line | NHTSA treadwear | Continental warranty (miles) |
|---|---|---|
| ProContact TX | 400–540 | 40,000–65,000 |
| ProContact GX | 400–540 | 40,000–65,000 |
| ProContact RX | 400–540 | 40,000–55,000 |
| ContiProContact | 400–540 | 40,000–80,000 |
| ExtremeContact DWS06 Plus | 560 | 50,000 |
| ExtremeContact Sport 02 | 340 | 30,000 |
| ControlContact Sport A/S | 540 | 50,000 |
| CrossContact LX25 | 740 | 65,000–70,000 |
| PureContact LS | 700 | 70,000 |
| TerrainContact A/T | 680 | 60,000 |
| TerrainContact H/T | 720–800 | 60,000–70,000 |
| TrueContact Tour | 700–800 | 70,000–80,000 |
Sources: NHTSA ratings API (pulled 2026-10-25); Continental Tire “Mileage Warranty” support article, read 2026-10-25. Only lines whose names match in both sources are listed. Original-equipment tires are excluded from Continental’s warranty.
Two things stand out. Within a single line the warranty swings with the speed rating: ContiProContact (40,000–80,000 miles) each sit on a single NHTSA treadwear range. And across lines, the ratio of top warranty to the line’s top treadwear grade isn’t constant: from about 88 miles per treadwear point (TerrainContact H/T) to about 148 (ContiProContact). That is one maker’s lineup, not a market-wide formula.
A maker-run test shows the same gap
In a 2022 press release Michelin reported a treadwear test of size 225/65R17 tires on 2021 Toyota RAV4s, with an “estimated life (based on calculating the most-worn groove of a rotated set)”. This is Michelin’s own test of its own product, and it says “actual on-road results may vary” (Michelin North America). Against the NHTSA grade for each line:
| Tire (225/65R17) | Michelin-reported estimated life (miles) | NHTSA treadwear | Miles per treadwear point* |
|---|---|---|---|
| Michelin Defender2 | 94,400 | 840 | ~112 |
| Continental TrueContact Tour | 59,400 | 700–800 | ~74 |
| Goodyear Assurance MaxLife | 51,900 | 820 | ~63 |
| Bridgestone Alenza AS Ultra | 47,700 | 800 | ~60 |
*Estimated life ÷ the line’s median NHTSA grade (Defender2 840, Tour 800, MaxLife 820, Ultra 800). Our arithmetic. All four lines carry NHTSA grades between 700 and 840; the reported lives span about 60–112 miles per point.
How to use both
- Use treadwear to compare within a maker, and the warranty to compare across makers, remembering the conditions above.
- Check the warranty by speed rating for your exact size, not the headline number.
- Keep receipts and rotation records from day one.
- For a per-dollar view, see how to calculate tire cost per mile. Maker warranty facts we’ve read are on line pages such as Michelin Defender 2 and Continental ProContact TX.
FAQ
Is a tire’s mileage warranty the same as how long it will last?
No. It is a limited, usually pro-rated promise with conditions (receipts, rotation records, wear to 2/32 inch, an age limit), and actual mileage varies with driving habits, vehicle and roads.
How does a pro-rated tire warranty work?
Using Continental’s published example: a tire that wore out at 45,000 miles on a 60,000-mile warranty received 75% of the warranty mileage, so the owner pays 75% of the replacement tire’s price plus taxes, mounting, balancing and other fees.
Can I convert a treadwear grade into miles?
No. NHTSA data and maker warranty tables show no fixed relationship, and the Tire Industry Association says treadwear is not a direct indicator of mileage.
Do all makers have the same warranty conditions?
No. Continental’s conditions (rotation every 6,000–8,000 miles, 72-month limit, original-equipment exclusion) are one maker’s terms; check the warranty booklet for your tire.
Look up real ratings
- 225/65R17 tires ranked by treadwear35 graded lines
- Michelin Defender 2Treadwear 840 median
- Continental ProContact TXTreadwear 500 median
Sources
- 49 CFR § 575.104 Uniform tire quality grading standards, U.S. Code of Federal Regulations (eCFR). Retrieved 2026-10-25.
- Mileage Warranty (support article, updated June 12, 2026), Continental Tire. Retrieved 2026-10-25.
- Michelin launches Defender 2 tire (press release, Sept. 14, 2022), Michelin North America. Retrieved 2026-10-25.
- Tire Replacement, Tire Industry Association. Retrieved 2026-10-25.
- TireWise: Tire Safety Ratings and Awareness, NHTSA. Retrieved 2026-10-25.
NHTSA ratings are from the dataset we publish. Maker statements are the makers’ own claims. We make no price claims. Found an error? See About & corrections.
Keep reading
- What does a tire treadwear rating mean?UTQG basics
- How to calculate tire cost per mileBuying math
- How to make your tires last longerMaintenance