Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.
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Prices change daily — check the retailer for your size.
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Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Tire Rack owners | 87 | – |
| SimpleTire owners | 93 | – |
| America's Tire owners | 94 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Tire Rack owners | 74 | – |
| SimpleTire owners | 94 | – |
| America's Tire owners | 91 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Tire Rack owners | 90 | – |
| SimpleTire owners | 80 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Tire Rack owners | 71 | – |
| SimpleTire owners | 84 | – |
| America's Tire owners | 88 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| SimpleTire owners | 84 | – |
| America's Tire owners | 90 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Tire Rack owners | 86 | – |
| SimpleTire owners | 87 | – |
| America's Tire owners | 90 | – |
| Source | Discoverer HT3 | Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| America's Tire owners | 91 | – |
| Category | Cooper Discoverer HT3 | Dunlop Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Relative Score | 96 | 79 |
| Dry | 99 | 88 |
| Wet | 97 | 82 |
| Snow | 91 | 69 |
| Comfort | 97 | 85 |
| Noise | 94 | 89 |
| Treadwear | 95 | 68 |
| Handling | – | 87 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
Tire A
Tire B
Only categories both tires have data for count toward the headline score.
| Attribute | A · Cooper Discoverer HT3 | B · Dunlop Grandtrek Touring A/S DSST RunOnFlat |
|---|---|---|
| Sizes available | 17 | — |
| Rim diameters | 15″ – 20″ | — |
| Tread depth | 14 - 15/32″ | — |
| Treadwear warranty | 50,000 mi | — |
| Sidewall | Black Side Wall | — |
| Max pressure | 50 - 83 psi | — |
Cooper
Dunlop
Winner: Cooper Discoverer HT3 — better treadwear, snow and wet. It leads or ties in every category we score.
Cooper Discoverer HT3 scores 95 vs 68 on treadwear.
Cooper Discoverer HT3 scores 91 vs 69 on snow.
Cooper Discoverer HT3 scores 97 vs 82 on wet.
Cooper Discoverer HT3 scores 97 vs 85 on comfort.
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.
Community buzz from Reddit and forums is shown for context only — it never changes the score.
