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Head-to-head Updated

Cooper Discoverer Road Trail A/T 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 6 + 2,013 owner reviews. How we score

Too close to call: Discoverer Road Trail A/T 74, Open Country A/T III 73.

Check price on Amazon · Discoverer Road Trail A/T Check price on Amazon · Open Country A/T III
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Toyo Open Country A/T III
Tire BToyo

Open Country A/T III

All-Terrain tire

± 6

Tests 67 · 3 tests Owners 79 · 2,013 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.

  1. 72

    Dry

    Open Country A/T III +4
    76
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 2 tests≈ 71 (est.)71
    Reviews found online7483

    Discoverer Road Trail A/T: 60% × 70.6 (est.) + 40% × 74.1 = 72

    Open Country A/T III: 60% × 70.8 + 40% × 83.1 = 76

    No road tests of dry for Discoverer Road Trail A/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 79

    Wet

    Discoverer Road Trail A/T +10
    69
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 2 tests≈ 77 (est.)61
    Reviews found online8380

    Discoverer Road Trail A/T: 60% × 77.4 (est.) + 40% × 82.7 = 79

    Open Country A/T III: 60% × 61.4 + 40% × 80.2 = 69

    No road tests of wet for Discoverer Road Trail A/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 74

    Snow

    Discoverer Road Trail A/T +3
    71
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 1 tests≈ 73 (est.)68
    Reviews found online7677

    Discoverer Road Trail A/T: 60% × 72.6 (est.) + 40% × 75.7 = 74

    Open Country A/T III: 60% × 67.6 + 40% × 76.7 = 71

    No road tests of snow for Discoverer Road Trail A/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

  4. 75

    Comfort

    Discoverer Road Trail A/T +3
    72
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 1 tests≈ 71 (est.)64
    Reviews found online7878

    Discoverer Road Trail A/T: 40% × 70.7 (est.) + 60% × 77.5 = 75

    Open Country A/T III: 40% × 64 + 60% × 78 = 72

    No road tests of comfort for Discoverer Road Trail A/T. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. –

    Noise

    No comparison
    65
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 1 tests–61
    Reviews found online–71

    Open Country A/T III: 60% × 60.6 + 40% × 71.1 = 65

  6. 68

    Treadwear

    Open Country A/T III +6
    74
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Professional tests (TWG score) · – / 1 tests≈ 67 (est.)71
    Reviews found online6979

    Discoverer Road Trail A/T: 60% × 67.2 (est.) + 40% × 69.1 = 68

    Open Country A/T III: 60% × 71.1 + 40% × 78.5 = 74

    No road tests of treadwear for Discoverer Road Trail A/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  7. 74

    Handling (owners)

    Open Country A/T III +5
    79
    Why this score
    SourceDiscoverer Road Trail A/TOpen Country A/T III
    Reviews found online7479
Scores at a glance
CategoryCooper Discoverer Road Trail A/TToyo Open Country A/T III
Relative Score 74 73
Dry 72 76
Wet 79 69
Snow 74 71
Comfort 75 72
Noise – 65
Treadwear 68 74
Handling (owners) 74 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

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
± 8

Discoverer Road Trail A/T

± 6

Open Country A/T III

Only categories both tires have data for count toward the headline score.

Pros, cons & observations

Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.

Tire A Discoverer Road Trail A/T

Pros

  • Very low noise levels for an all-terrain tire
  • Confident and reliable wet weather traction
  • Smooth and comfortable ride quality

Cons

  • Slight increase in road noise and reduction in dry grip as mileage increases
  • Compound can struggle a bit on slicker, chilly asphalt during heavy rain
  • Initial reports of quick wear, though potentially attributed to low tire pressure
All owner themes in the Discoverer Road Trail A/T review

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
All owner themes in the Open Country A/T III review

What real owners are saying

From Reddit, forums and review threads. Not part of our score

Tire A

Cooper Discoverer Road Trail A/T

We haven't collected enough community discussion about this tire yet.

Tire B

Toyo Open Country A/T III

Positive

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.

r/ToyotaTacoma ·16 upvotes ·2022-06-23

“After a ton of online reading and internal debate, finally decided on the Toyo Open Country A/T III in stock size 265/65/17. Original tires in last pic.”
ramforum.com ·2022-09-20

“Definitely....I put them on my 2WD 1500 last fall and they are the best tires I've ever had. Great in the snow and wet. Pricey ($1100 total in my case) but worth it. Pete”
r/COsnow ·1 upvote ·2026-10-07

“Appreciate you asking the question and why not just swap out for the Toyo Open Country A/T III with the 3MPSF rating right before you make the drive? I've run dedicated winter tires for years now and would not consider them useable at a 7/32 tread level. Hope you have a great time in CO and enjoy the road trip!”
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 Road Trail A/T B · Toyo Open Country A/T III
CategoryAll-Terrain tireAll-Terrain tire
Vehicle type—SUV and 4x4
Sizes available—103
Rim diameters—15″ – 22″
Tread depth—10 - 17/32″
UTQG—360 - 600 A A - B
Sidewall—Black Side Wall - Raised Outline White Lettering
Max pressure—35 - 80 psi

Which one should you actually buy?

Cooper Discoverer Road Trail A/T

Toyo Open Country A/T III

Too close to call: Cooper Discoverer Road Trail A/T and Toyo Open Country A/T III are within 2 points overall. Cooper Discoverer Road Trail A/T is stronger on wet, snow and comfort. Toyo Open Country A/T III is stronger on treadwear and dry. Cooper Discoverer Road Trail A/T rests on little evidence so far (0 tests, 6 reviews), so read this result as provisional.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer Road Trail A/T scores 79 vs 69 on wet.

Pick tire B You want the longest tread life

Toyo Open Country A/T III scores 74 vs 68 on treadwear.

Pick tire B You want the most grip on dry roads

Toyo Open Country A/T III scores 76 vs 72 on dry.

Pick tire A You drive through snowy winters

Cooper Discoverer Road Trail A/T scores 74 vs 71 on snow.

Tire A · Cooper Discoverer Road Trail A/T
Check price on Amazon
Tire B · Toyo Open Country A/T III
Check price on Amazon

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Discoverer Road Trail A/T or Open Country A/T III?

Which is better in the wet, Discoverer Road Trail A/T or Open Country A/T III?

Cooper Discoverer Road Trail A/T, 79 vs 69 on our wet score.

Which grips better on dry roads, Discoverer Road Trail A/T or Open Country A/T III?

Toyo Open Country A/T III, 76 vs 72 on our dry score.

Which is better in snow, Discoverer Road Trail A/T or Open Country A/T III?

Cooper Discoverer Road Trail A/T, 74 vs 71 on our snow score.

Which is more comfortable, Discoverer Road Trail A/T or Open Country A/T III?

Cooper Discoverer Road Trail A/T, 75 vs 72 on our comfort score.

Which lasts longer, Discoverer Road Trail A/T or Open Country A/T III?

Toyo Open Country A/T III, 74 vs 68 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