Tests – · none yet Owners 67 · 973 reviews
“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”
Head-to-head
Updated
Cooper Discoverer A/T3 vs Toyo Open Country A/T III — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews (comfort 40/60). Based on 0 + 3 road tests and 973 + 2,011 owner reviews. How we score
Open Country A/T III leads, 72–69 Narrow edge
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Tests 67 · 3 tests Owners 79 · 2,011 reviews
Best test result: #5 of 18 in 2022 Consumer Reports All Terrain Truck Tires (tested tread life (miles))
“Toyo Open Country A/T III Picked up 4 new AT3s for my 2023 crosstrek for about $900 from Firestone so far it holds up well there is slight road noise and they ride a little softer than the original Yokohamas. Read more”
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
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73
Dry
Open Country A/T III +376Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 2 tests ≈ 71 (est.) 71 Reviews found online 75 83 Discoverer A/T3: 60% × 71 (est.) + 40% × 74.9 = 73
Open Country A/T III: 60% × 70.8 + 40% × 83.1 = 76
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 0.42).
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75
Wet
Discoverer A/T3 +669Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 2 tests ≈ 74 (est.) 61 Reviews found online 76 80 Discoverer A/T3: 60% × 73.9 (est.) + 40% × 76.4 = 75
Open Country A/T III: 60% × 61.4 + 40% × 80.3 = 69
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 0.55).
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69
Snow
Open Country A/T III +271Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 1 tests ≈ 70 (est.) 68 Reviews found online 68 77 Discoverer A/T3: 60% × 69.7 (est.) + 40% × 67.9 = 69
Open Country A/T III: 60% × 67.6 + 40% × 76.7 = 71
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 0.37).
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68
Comfort
Open Country A/T III +472Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 1 tests ≈ 69 (est.) 64 Reviews found online 67 78 Discoverer A/T3: 40% × 68.8 (est.) + 60% × 67.1 = 68
Open Country A/T III: 40% × 64 + 60% × 78 = 72
No road tests of comfort for Discoverer A/T3. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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66
Noise
Discoverer A/T3 +165Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 1 tests ≈ 67 (est.) 61 Reviews found online 65 71 Discoverer A/T3: 60% × 66.6 (est.) + 40% × 65.4 = 66
Open Country A/T III: 60% × 60.6 + 40% × 71.2 = 65
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.
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57
Treadwear
Open Country A/T III +1774Why this score
Source Discoverer A/T3 Open Country A/T III Professional tests (TWG score) · – / 1 tests ≈ 61 (est.) 71 Reviews found online 52 79 Discoverer A/T3: 60% × 61.1 (est.) + 40% × 51.6 = 57
Open Country A/T III: 60% × 71.1 + 40% × 78.6 = 74
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 0.35).
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65
Handling (owners)
Open Country A/T III +1479Why this score
Source Discoverer A/T3 Open Country A/T III Reviews found online 65 79
Scores at a glance
| Category | Cooper Discoverer A/T3 | Toyo Open Country A/T III |
|---|---|---|
| Relative Score | 69 | 72 |
| Dry | 73 | 76 |
| Wet | 75 | 69 |
| Snow | 69 | 71 |
| Comfort | 68 | 72 |
| Noise | 66 | 65 |
| Treadwear | 57 | 74 |
| Handling (owners) | 65 | 79 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
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.
Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
69
/ 100
Discoverer A/T3
72
/ 100
Open Country A/T III
The professional test results behind the scores
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 A/T III | 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 | #6/8 2025 ADAC All Terrain Tyre Test | – | Different tests |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Discoverer A/T3
Pros
- Exceptionally quiet and smooth highway ride for an all-terrain tire
- Great traction and handling on dry and wet pavement
- Strong value and competitive pricing compared to major brand competitors
Cons
- Some users experienced balancing issues and persistent road vibrations
- Faster-than-expected tread wear or premature wear reported by a subset of drivers
- Subpar performance on ice and hard-packed snow for certain vehicle applications
Tire B Open Country A/T III
Pros
- Low road noise and smooth, comfortable highway ride
- Excellent all-weather traction, particularly in snow, rain, and mud
- Aggressive and attractive tread/sidewall design
Cons
- Some users reported occasional slipping or reduced confidence on wet pavement or heavy downpours
- Higher price point compared to some competitors
- A minority of drivers experienced faster-than-expected tread wear or increased noise as the tires aged
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer A/T3
The community expresses overwhelmingly positive feedback for the Cooper Discoverer A/T3, praising its strong performance on the highway, good wet and snow traction, and smooth, relatively quiet ride quality. Many users note that the tires wear well over tens of thousands of miles, though some mention that they can get slightly louder as they age and tend to pack up in deep mud. Overall, users consider them to be reliable, high-value all-terrain tires suitable for daily driving, towing, and light off-roading.
f150forum.com
“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!”
bobistheoilguy.com
·2012-09-08
“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.”
ford-trucks.com
“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”
Top themes
#Highway and road manners#Winter and snow traction#Treadwear and longevity#Low road noise#Value for money#Towing and load handling#Mud performance limitations
Based on 25 community posts
Tire B
Positive
Toyo Open Country A/T III
Community sentiment toward the Toyo Open Country A/T III is largely positive, with owners highlighting strong snow and wet traction, durable tread wear, and a comfortable ride. Some mixed feedback centers on moderate road noise over time and stiffness, alongside reports of sidewall vulnerabilities when running lower C-load ratings on rough off-road terrain compared to E-load options. A few discussions also note tire recall inquiries and vehicle-specific fitment questions.
forum.ih8mud.com
·2022-10-17
“I upgraded to the Toyo Open Country A/T III, 285-70-17 and in the past 2 months I have got 4 flats. All from the sidewall, today was 2. I air down between 15-19 psi for the trails. Today I purposefully took it easy and had 2 flats. Are these tires junk? Is a KO2 a better stronger choice?”
at4forum.com
·6 upvotes ·2024-03-18
“I picked up a 24 AT4 on Saturday and swapped out the tires today from the good years to Toyo's. Same size 265/60/20 as factory and what a difference they make. No noise and a softer ride. I got a credit of $130 a tire and negotiated with dealer to give me $500 towards the new tires so not much out of pocket. Highly recommend. Now time for some new shocks which is a pretty daunting research project. Lots of opinions out there, but ranchos seem to be unanimously despised. Thanks forum members for pointing me in the direction of Toyo's.”
r/ToyotaTundra
·2026-09-23
“21 trd pro.... tires I need to pick out some new tires on the Tundra, I am leaning on trying toyo open country A/T III. I have historically used BFG KO2s on all my trucks and can't decide if I should stick with bfg and the new KO3 or try out the Toyos. I live in Montana plenty of winter, and I get out in woods as often as I can from what i put together both tires will handle what I throw at them just fine just curious what others have experienced with either tire.”
Top themes
#snow and wet traction#road noise levels#tread wear and longevity#load rating and sidewalls#towing and ride comfort#EV variant performance
Based on 54 community posts
Specs side by side
| Attribute | A · Cooper Discoverer A/T3 | B · Toyo Open Country A/T III |
|---|---|---|
| Category | All-Terrain tire | All-Terrain tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 14 | 103 |
| Rim diameters | 15″ – 22″ | 15″ – 22″ |
| Tread depth | 14 - 17/32″ | 10 - 17/32″ |
| UTQG | 560 A B | 360 - 600 A A - B |
| Sidewall | Black Side Wall - Raised Outline White Lettering | Black Side Wall - Raised Outline White Lettering |
| Max pressure | 44 - 80 psi | 35 - 80 psi |
| Sizes in common | 12 | 12 |
Which one should you actually buy?
69
/ 100
Cooper Discoverer A/T3
72
/ 100
Toyo Open Country A/T III
Narrow edge: Toyo Open Country A/T III — better treadwear, handling and comfort. Pick the Cooper Discoverer A/T3 if wet matters most to you.
Pick tire B
You want the longest tread life
Toyo Open Country A/T III scores 74 vs 57 on treadwear.
Pick tire B
You enjoy sharp, responsive handling
Toyo Open Country A/T III scores 79 vs 65 on handling.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer A/T3 scores 75 vs 69 on wet.
Pick tire B
You want the most comfortable ride
Toyo Open Country A/T III scores 72 vs 68 on comfort.
Tire A · Cooper Discoverer A/T3
Tire B · Toyo Open Country A/T III
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Discoverer A/T3 or Open Country A/T III?
Which is better in the wet, Discoverer A/T3 or Open Country A/T III?
Cooper Discoverer A/T3, 75 vs 69 on our wet score.
Which grips better on dry roads, Discoverer A/T3 or Open Country A/T III?
Toyo Open Country A/T III, 76 vs 73 on our dry score.
Which is better in snow, Discoverer A/T3 or Open Country A/T III?
Neither, by our numbers: 69 vs 71 on the snow score, within 3 points.
Which is quieter, Discoverer A/T3 or Open Country A/T III?
Neither, by our numbers: 66 vs 65 on the noise score, within 3 points.
Which is more comfortable, Discoverer A/T3 or Open Country A/T III?
Toyo Open Country A/T III, 72 vs 68 on our comfort score.
Which lasts longer, Discoverer A/T3 or Open Country A/T III?
Toyo Open Country A/T III, 74 vs 57 on our treadwear score.
How do we compare tires?
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