315/40R21 tires ranked by treadwear
Ranking: 315/40R21 tire lines by NHTSA treadwear grade
Sorted from highest to lowest treadwear. Ties share a rank. If a line has several records for this size with different grades, the lowest is used for ranking and the range is shown. Enter your own price and expected miles in the last columns; nothing is pre-filled because price and warranty data are pending a feed.
| Rank | Brand | Line | Treadwear | Traction | Temp. | Price / set ($) | Expected miles | $ per 1,000 mi |
|---|---|---|---|---|---|---|---|---|
| 1 | Hankook | iON evo R AS SUV (OE) | 540Treadwear | Traction AA | Temp A | — | ||
| 1 | Hankook | iON Supreme AS SUV (OE) | 540Treadwear | Traction AA | Temp A | — | ||
| 1 | Michelin | Primacy Tour A/S | 540Treadwear | Traction B | Temp A | — | ||
| 4 | Hankook | veNtus evo3 SUV | 320Treadwear | Traction AA | Temp A | — | ||
| 5 | Michelin | Pilot Sport 4 SUV | 300Treadwear | Traction AA | Temp A | — | ||
| 6 | Goodyear | EAGLE F1 ASYMMETRIC 6 | 260Treadwear | Traction AA | Temp A | — | ||
| 6 | Hankook | iON evo SUV (OE) | 260Treadwear | Traction AA | Temp A | — | ||
| 8 | Continental | SportContact 6 | 240Treadwear | Traction AA | Temp A | — | ||
| 9 | Michelin | Latitude Sport 3 | 220Treadwear | Traction A | Temp A | — | ||
| 10 | Hankook | iON Supreme SUV (OE) | 200Treadwear | Traction AA | Temp A | — |
Click a column heading to sort. Treadwear bar shows the lowest grade filed for this size.
How the 10 lines spread across treadwear bands
| Treadwear band | Lines | Share |
|---|---|---|
| 200–299 | 5 | 50% |
| 300–399 | 2 | 20% |
| 500–599 | 3 | 30% |
The median line sits in the 200–299 band: a lower-than-typical treadwear grade, common on sport and high-performance tires.
Best treadwear grade by brand for 315/40R21
| Brand | Highest grade for this size |
|---|---|
| Hankook | 540 |
| Michelin | 540 |
| Goodyear | 260 |
| Continental | 240 |
Reading this page
- Coverage: NHTSA lists a specific size for only 61% of its records (4,665 of 7,628); the rest are filed as “All sizes” or size ranges. Those lines may well be sold in 315/40R21 but cannot be placed here, so this is a lower bound, not a full catalog. A size catalog feed is needed for completeness.
- Size types in records: unspecified. Load index and speed rating are not compared here.
- Treadwear grades are set by each manufacturer and are most reliable for comparing tires of the same maker. See methodology and NHTSA TireWise.
FAQ
Which 315/40R21 tire has the highest treadwear rating?
In NHTSA's UTQG data the highest treadwear grade filed for 315/40R21 is 540, shared by 3 lines. This covers only lines whose NHTSA record names this exact size.
What is a typical treadwear grade for 315/40R21 tires?
The median treadwear grade across the 10 rated lines for 315/40R21 is 280. Across all sizes in the dataset the median is 420.
What is the cost per mile of 315/40R21 tires?
We have no licensed price or warranty-mileage feed yet, so cost per mile is not computed. Use cost per 1,000 miles = price per set ÷ (expected miles ÷ 1,000) with your own quote; the table below has inputs for each line.
Guides that explain these numbers
- How to find the longest-lasting tires for your sizeChoosing
- How to read a tire sidewallTire sizes
- How to calculate tire cost per mileBuying math