Firestone · tire line
Firestone AFFINITY AS: treadwear rating & UTQG grades
Grade summary
Key facts
| Treadwear (NHTSA UTQG) | 500median · range 500 · band 500–599 |
|---|---|
| Traction grade(s) | Traction AA |
| Temperature grade(s) | Temp A |
| Percentile (all lines) | Median treadwear higher than 68% of 3,020 lines |
| Rank within Firestone | #16 of 63 rated lines (by median treadwear) |
| NHTSA records | 4 total; 4 name a specific size (4 distinct sizes) |
| Warranty miles | Not shown (no maker-published figure verified) |
| Price | Not shown (varies by size and store); see “Where to buy” |
What these grades mean in plain English
- Treadwear 500: this is a high treadwear grade; the manufacturer rates this tire to wear slowly relative to the government control tire. Under UTQG a grade of 200 should wear twice as long as the grade-100 control tire on NHTSA's test course; real-world mileage varies with driving, rotation, alignment and climate.
- Traction AA: AA (highest): best wet-pavement straight-line braking grade on the government test surfaces. Traction is straight-ahead wet braking only; it does not measure cornering or hydroplaning.
- Temperature A: A (highest): resisted heat build-up through the higher 575 rpm test stage.
- Ranked just above in Firestone: DESTINATION LE 2 (median 520).
- Ranked just below in Firestone: AFFINITY HP (median 500).
NHTSA records for Firestone AFFINITY AS
Each row is one NHTSA record as filed by the manufacturer. Sizes are shown exactly as NHTSA lists them; entries such as “All sizes” apply a single grade to several sizes and cannot be matched to one specific size.
| Size (as filed) | Treadwear | Traction | Temperature |
|---|---|---|---|
| 215/45R17 | 500 | Traction AA | Temp A |
| 225/40R18 | 500 | Traction AA | Temp A |
| 225/45R17 | 500 | Traction AA | Temp A |
| 245/45R18 | 500 | Traction AA | Temp A |
Compare this line with others in the same size: 225/45R17, 215/45R17, 245/45R18, 225/40R18.
Cost-per-mile calculator
Price and mileage data are pending a licensed feed, so nothing is pre-filled. Enter your own quote and your own mileage expectation (for example the maker's treadwear warranty from the tire's paperwork). Formula: cost per 1,000 miles = price per set ÷ (expected miles ÷ 1,000).
Other Firestone lines by treadwear
| Rank | Line | Median treadwear |
|---|---|---|
| 1 | Destination LE3 | 700Treadwear |
| 2 | Destination LE4 | 700Treadwear |
| 3 | Transforce LE3 | 700Treadwear |
| 4 | All Season V2 | 640Treadwear |
| 5 | Pathway AS | 640Treadwear |
| 6 | Champion Fuel Fighter (H-V rated) | 600Treadwear |
| 7 | Champion Fuel Fighter (T rated) | 600Treadwear |
| 8 | AFFINITY LH30 | 560Treadwear |
| 9 | AFFINITY TOURING | 560Treadwear |
| 10 | FR710 | 560Treadwear |
| 11 | FT140 | 560Treadwear |
| 12 | Precision Touring | 560Treadwear |
Similar treadwear from other brands
Other lines in the same treadwear band (500–599) with a page here: American PROSPECTOR A/T LT (500), Americus Sport HP (500), Americus Touring Plus (500), Bridgestone DUELER H/P SPORT AS (500), Comanche RADIAL A/T (500), Comanche RADIAL H/T (500).
Guides that explain these numbers
- What does a tire treadwear rating mean?UTQG basics
- Treadwear rating vs. mileage warrantyTreadwear vs. mileage
- How to make your tires last longerMaintenance
FAQ
What is the treadwear rating of the Firestone AFFINITY AS?
NHTSA's UTQG data lists a single treadwear grade of 500 for the Firestone AFFINITY AS, from 4 records. Treadwear is graded in multiples of 20 relative to a government control tire graded 100; it is not a mileage guarantee.
Is the Firestone AFFINITY AS treadwear grade high or low?
A grade of 500 is a high treadwear grade; the manufacturer rates this tire to wear slowly relative to the government control tire. Compared with every line in the NHTSA data, the median is higher than 68% of lines (dataset median 420). Within Firestone it ranks #16 of 63.
What is the cost per mile of the Firestone AFFINITY AS?
We do not have a licensed price or warranty-mileage feed yet, so we do not state a cost per mile. Use the formula cost per 1,000 miles = price per set ÷ (expected miles ÷ 1,000) with your own quote and mileage expectation, or the calculator on this page.
Source and caveats
Source: NHTSA tire ratings API, pulled 2026-10-25. Grade definitions: NHTSA TireWise and 49 CFR 575.104. Grades are self-reported by manufacturers. The NHTSA data has no “currently sold” flag (its active field is false on every record), so a listed line may be discontinued. See methodology.