Sumitomo · tire line
Sumitomo HTR ENHANCE L/X: treadwear rating & UTQG grades
Grade summary
Key facts
| Treadwear (NHTSA UTQG) | 440median · range 440 · band 400–499 |
|---|---|
| Traction grade(s) | Traction A |
| Temperature grade(s) | Temp A |
| Percentile (all lines) | Median treadwear higher than 54% of 3,020 lines |
| Rank within Sumitomo | #43 of 72 rated lines (by median treadwear) |
| NHTSA records | 6 total; 6 name a specific size (6 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 440: this is an above-average treadwear grade, typical of many touring and all-season tires. 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 A: A: second-highest wet-braking grade. 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 Sumitomo: Duration (median 440).
- Ranked just below in Sumitomo: HTR ENHANCE L/X "W" (standard load) (median 440).
NHTSA records for Sumitomo HTR ENHANCE L/X
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 |
|---|---|---|---|
| 245/40R19 | 440 | Traction A | Temp A |
| 245/45R19 | 440 | Traction A | Temp A |
| 245/50R18 | 440 | Traction A | Temp A |
| 255/40R19 XL | 440 | Traction A | Temp A |
| 255/45R18 | 440 | Traction A | Temp A |
| 275/40R19 | 440 | Traction A | Temp A |
Compare this line with others in the same size: 245/40R19, 245/45R19, 245/50R18, 255/40R19, 255/45R18, 275/40R19.
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 Sumitomo lines by treadwear
| Rank | Line | Median treadwear |
|---|---|---|
| 1 | HTR Enhance LX2 (T-rating) | 800Treadwear |
| 2 | HTR ENHANCE L/X "T" (standard load) | 700Treadwear |
| 3 | HTR Enhance LX2 (H-rating) | 700Treadwear |
| 4 | ECHELON ULTRA LST (T rated) | 680Treadwear |
| 5 | HTR ENHANCE CX2 | 680Treadwear |
| 6 | ENCOUNTER AT | 660Treadwear |
| 7 | HTR Enhance LX2 (V-rated sizes) | 660Treadwear |
| 8 | ENCOUNTER HT2 (H and V rating) | 640Treadwear |
| 9 | ENCOUNTER HT2 (T rating) | 640Treadwear |
| 10 | HTR A/S P03 (H and V rating) | 640Treadwear |
| 11 | HTR ENHANCE CUV (H rating) | 640Treadwear |
| 12 | Tempra Touring TR | 620Treadwear |
Similar treadwear from other brands
Other lines in the same treadwear band (400–499) with a page here: Big O SXP SUPER SPORT (440), Cyclone Radial GT (440), Dimension IV ALL SEASON (440), GENERAL TIRE G-MAX Justice (440), Hankook Optimo H426 (440), JK Tyre UX ROYALE (440).
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 Sumitomo HTR ENHANCE L/X?
NHTSA's UTQG data lists a single treadwear grade of 440 for the Sumitomo HTR ENHANCE L/X, from 6 records. Treadwear is graded in multiples of 20 relative to a government control tire graded 100; it is not a mileage guarantee.
Is the Sumitomo HTR ENHANCE L/X treadwear grade high or low?
A grade of 440 is an above-average treadwear grade, typical of many touring and all-season tires. Compared with every line in the NHTSA data, the median is higher than 54% of lines (dataset median 420). Within Sumitomo it ranks #43 of 72.
What is the cost per mile of the Sumitomo HTR ENHANCE L/X?
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.