Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 0 + 0 road tests and 973 + 5 owner reviews. How we score
Open Country WT is ahead, 75–69
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Tests – · none yet Owners 67 · 973 reviews
“I have a set of 275/60R20 on my dodge work truck. Coming up on 35k. Oilfield roads. These tires are ride smooth and are quiet. They have done well in the snow and mud for me. I will purchase a set of these for my own personal truck once needed. These are great tires.”
Tests – · none yet Owners 78 · 5 reviews
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 70 (est.) | ≈ 72 (est.) |
| Reviews found online | 73 | 79 |
Discoverer A/T3: 60% × 69.9 (est.) + 40% × 73.1 = 71
Open Country WT: 60% × 72.3 (est.) + 40% × 79.1 = 75
No road tests of dry for Discoverer A/T3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
No road tests of dry for Open Country WT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 72 (est.) | ≈ 77 (est.) |
| Reviews found online | 74 | 83 |
Discoverer A/T3: 60% × 72.3 (est.) + 40% × 74.3 = 73
Open Country WT: 60% × 77.1 (est.) + 40% × 82.9 = 79
No road tests of wet for Discoverer A/T3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
No road tests of wet for Open Country WT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 69 (est.) | ≈ 71 (est.) |
| Reviews found online | 66 | 74 |
Discoverer A/T3: 60% × 68.6 (est.) + 40% × 66.1 = 68
Open Country WT: 60% × 71.1 (est.) + 40% × 73.6 = 72
No road tests of snow for Discoverer A/T3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
No road tests of snow for Open Country WT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 69 (est.) | ≈ 70 (est.) |
| Reviews found online | 68 | 77 |
Discoverer A/T3: 60% × 68.9 (est.) + 40% × 68 = 69
Open Country WT: 60% × 70.4 (est.) + 40% × 76.6 = 73
No road tests of comfort for Discoverer A/T3 or Open Country WT. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 67 (est.) | – |
| Reviews found online | 66 | – |
Discoverer A/T3: 60% × 67.3 (est.) + 40% × 65.8 = 67
No road tests of noise for Discoverer A/T3. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Professional tests (TWG score) | ≈ 62 (est.) | ≈ 68 (est.) |
| Reviews found online | 54 | 75 |
Discoverer A/T3: 60% × 62 (est.) + 40% × 53.7 = 59
Open Country WT: 60% × 68.4 (est.) + 40% × 74.5 = 71
No road tests of treadwear for Discoverer A/T3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
No road tests of treadwear for Open Country WT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
| Source | Discoverer A/T3 | Open Country WT |
|---|---|---|
| Reviews found online | 65 | 80 |
| Category | Cooper Discoverer A/T3 | Toyo Open Country WT |
|---|---|---|
| Relative Score | 69 | 75 |
| Dry | 71 | 75 |
| Wet | 73 | 79 |
| Snow | 68 | 72 |
| Comfort | 69 | 73 |
| Noise | 67 | – |
| Treadwear | 59 | 71 |
| Handling (owners) | 65 | 80 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Wet grip starts at “Important”. Treadwear starts at “Neutral” here: road tests measured it for at most one of the two tires, so it rests on owner reviews. Move the sliders and the scores update instantly.
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Discoverer A/T3
Open Country WT
Only categories both tires have data for count toward the headline score.
Per discipline: the average % of the best tire over every test both tires were in, and how many of those tests each one won. “Different tests” rows compare results from separate tests.
| Discipline | Category | Discoverer A/T3 | Open Country WT | Δ | Head-to-head |
|---|---|---|---|---|---|
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #13/13 2018 SA4x4 All-Terrain Tire Test R17 | #5/8 2010 Auto Bild Winter 4x4 Tyre Test | – | Different tests |
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
From Reddit, forums and review threads. Not part of our score
Community sentiment for the Cooper Discoverer A/T3 is overwhelmingly positive, with users frequently praising its low road noise, smooth ride, and strong snow and wet traction. Owners appreciate its long tread life, solid towing capability, and reasonable value, though some note it packs up quickly in thick mud and can become slightly louder as it wears.
“Put a set on a day after I purchased my truck. Have about 8500 miles on them and no complaints whatsoever. Been on a 3000 trip with them not towing and a 2400 mile trip towing a 8K travel trailer. No problems on either trip. I'll get another set when these wear out, hopefully many miles down the road. No sign of wear yet!”
“I have a set of 275/60R20 on my dodge work truck. Coming up on 35k. Oilfield roads. These tires are ride smooth and are quiet. They have done well in the snow and mud for me. I will purchase a set of these for my own personal truck once needed. These are great tires.”
“Been running them on the wifes truck for 3 or 4 years now. They are a good tire, very little noise on pavement, does fine on snow. Cooper Discoverer A/T3 Review”
Based on 24 community posts
We haven't collected enough community discussion about this tire yet.
| Attribute | A · Cooper Discoverer A/T3 | B · Toyo Open Country WT |
|---|---|---|
| Category | All-Terrain tire | Winter |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 14 | 8 |
| Rim diameters | 15″ – 22″ | 16″ – 19″ |
| Tread depth | 14 - 17/32″ | — |
| UTQG | 560 A B | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | — |
| Max pressure | 44 - 80 psi | — |
| Sizes in common | 0 | 0 |
Cooper Discoverer A/T3
Toyo Open Country WT
Winner: Toyo Open Country WT — better handling, treadwear and wet. It leads or ties in every category we score. Toyo Open Country WT rests on little evidence so far (0 tests, 5 reviews), so read this result as provisional.
Toyo Open Country WT scores 80 vs 65 on handling.
Toyo Open Country WT scores 71 vs 59 on treadwear.
Toyo Open Country WT scores 79 vs 73 on wet.
Toyo Open Country WT scores 75 vs 71 on dry.
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Toyo Open Country WT, 79 vs 73 on our wet score.
Toyo Open Country WT, 75 vs 71 on our dry score.
Toyo Open Country WT, 72 vs 68 on our snow score.
Toyo Open Country WT, 73 vs 69 on our comfort score.
Toyo Open Country WT, 71 vs 59 on our treadwear score.
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements), each result compared with every other tire in the same test and newer tests counting more. 40% comes from owner reviews found online, adjusted for how generously each site rates. Both use one scale: the average tested tire gets 70, the best 100. When a tire has only one of the two, the missing half is estimated from the other and the score stays closer to average; with no road test and fewer than five owner reviews it gets no score yet.
Handling is the exception: road tests measure it inside the dry and wet scores, so its own row comes from owner ratings only and starts as less important.
Community buzz from Reddit and forums is shown for context only — it never changes the score. Full methodology
