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 + 14 owner reviews. How we score
Discoverer A/T3 leads, 69–66 Narrow edge
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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 65 · 14 reviews
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| Professional tests (TWG score) | ≈ 70 (est.) | ≈ 68 (est.) |
| Reviews found online | 73 | 68 |
Discoverer A/T3: 60% × 69.9 (est.) + 40% × 73.1 = 71
Geolandar G900: 60% × 67.9 (est.) + 40% × 68.1 = 68
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 Geolandar G900. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| Professional tests (TWG score) | ≈ 72 (est.) | ≈ 70 (est.) |
| Reviews found online | 74 | 71 |
Discoverer A/T3: 60% × 72.3 (est.) + 40% × 74.3 = 73
Geolandar G900: 60% × 70.3 (est.) + 40% × 70.7 = 70
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 Geolandar G900. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| Professional tests (TWG score) | ≈ 69 (est.) | ≈ 67 (est.) |
| Reviews found online | 66 | 61 |
Discoverer A/T3: 60% × 68.6 (est.) + 40% × 66.1 = 68
Geolandar G900: 60% × 66.9 (est.) + 40% × 60.8 = 64
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 Geolandar G900. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| Professional tests (TWG score) | ≈ 69 (est.) | ≈ 68 (est.) |
| Reviews found online | 68 | 60 |
Discoverer A/T3: 60% × 68.9 (est.) + 40% × 68 = 69
Geolandar G900: 60% × 67.6 (est.) + 40% × 60.3 = 65
No road tests of comfort for Discoverer A/T3 or Geolandar G900. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| 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 | Geolandar G900 |
|---|---|---|
| Professional tests (TWG score) | ≈ 62 (est.) | ≈ 64 (est.) |
| Reviews found online | 54 | 61 |
Discoverer A/T3: 60% × 62 (est.) + 40% × 53.7 = 59
Geolandar G900: 60% × 64.2 (est.) + 40% × 60.9 = 63
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 Geolandar G900. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
| Source | Discoverer A/T3 | Geolandar G900 |
|---|---|---|
| Reviews found online | 65 | 62 |
| Category | Cooper Discoverer A/T3 | Yokohama Geolandar G900 |
|---|---|---|
| Relative Score | 69 | 66 |
| Dry | 71 | 68 |
| Wet | 73 | 70 |
| Snow | 68 | 64 |
| Comfort | 69 | 65 |
| Noise | 67 | – |
| Treadwear | 59 | 63 |
| Handling (owners) | 65 | 62 |
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
Geolandar G900
Only categories both tires have data for count toward the headline score.
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 · Yokohama Geolandar G900 |
|---|---|---|
| Category | All-Terrain tire | Winter |
| Vehicle type | SUV and 4x4 | Passenger Car / Crossover |
| Sizes available | 14 | 2 |
| Rim diameters | 15″ – 22″ | 16″ – 17″ |
| Tread depth | 14 - 17/32″ | — |
| UTQG | 560 A B | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | — |
| Max pressure | 44 - 80 psi | — |
Cooper Discoverer A/T3
Yokohama Geolandar G900
Narrow edge: Cooper Discoverer A/T3 — better snow, comfort and dry. Pick the Yokohama Geolandar G900 if treadwear matters most to you. Yokohama Geolandar G900 rests on little evidence so far (0 tests, 14 reviews), so read this result as provisional.
Cooper Discoverer A/T3 scores 68 vs 64 on snow.
Cooper Discoverer A/T3 scores 69 vs 65 on comfort.
Yokohama Geolandar G900 scores 63 vs 59 on treadwear.
Cooper Discoverer A/T3 scores 71 vs 68 on dry.
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Cooper Discoverer A/T3, 73 vs 70 on our wet score.
Cooper Discoverer A/T3, 71 vs 68 on our dry score.
Cooper Discoverer A/T3, 68 vs 64 on our snow score.
Cooper Discoverer A/T3, 69 vs 65 on our comfort score.
Yokohama Geolandar G900, 63 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
