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Cooper Discoverer S/T Maxx vs Toyo Open Country M/T — 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 + 0 road tests and 326 + 241 owner reviews. How we score

Too close to call: Discoverer S/T Maxx and Open Country M/T are level at 67.

Check price on Amazon · Discoverer S/T Maxx Check price on Amazon · Open Country M/T
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Cooper Discoverer S/T Maxx
Tire ACooper

Discoverer S/T Maxx

All Season

± 7

Tests – · none yet Owners 67 · 326 reviews

“Personally a huge fan of the Cooper Discoverer S/T Maxx great on and offroad. Quite on road.”

Toyo Open Country M/T
Tire BToyo

Open Country M/T

Mud-Terrain tire

± 7

Tests – · none yet Owners 66 · 241 reviews

Category by category

Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.

  1. 71

    Dry

    Discoverer S/T Maxx +3
    68
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 70 (est.)≈ 68 (est.)
    Reviews found online7369

    Discoverer S/T Maxx: 60% × 70.2 (est.) + 40% × 73.4 = 71

    Open Country M/T: 60% × 68.2 (est.) + 40% × 68.5 = 68

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

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

  2. 72

    Wet

    Discoverer S/T Maxx +1
    71
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 72 (est.)≈ 71 (est.)
    Reviews found online7372

    Discoverer S/T Maxx: 60% × 71.8 (est.) + 40% × 72.7 = 72

    Open Country M/T: 60% × 71.3 (est.) + 40% × 71.7 = 71

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

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

  3. 69

    Snow

    Level
    69
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 70 (est.)≈ 70 (est.)
    Reviews found online6867

    Discoverer S/T Maxx: 60% × 69.6 (est.) + 40% × 67.5 = 69

    Open Country M/T: 60% × 69.5 (est.) + 40% × 67.2 = 69

    No road tests of snow for Discoverer S/T Maxx. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

    No road tests of snow for Open Country M/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 59

    Comfort

    Open Country M/T +2
    61
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 66 (est.)≈ 67 (est.)
    Reviews found online5458

    Discoverer S/T Maxx: 40% × 65.8 (est.) + 60% × 54.4 = 59

    Open Country M/T: 40% × 66.6 (est.) + 60% × 58.1 = 61

    No road tests of comfort for Discoverer S/T Maxx. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

    No road tests of comfort for Open Country M/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 59

    Noise

    Open Country M/T +5
    64
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online4760

    Discoverer S/T Maxx: 60% × 66.3 (est.) + 40% × 47.4 = 59

    Open Country M/T: 60% × 66.3 (est.) + 40% × 59.5 = 64

    No road tests of noise for Discoverer S/T Maxx or Open Country M/T. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 66

    Treadwear

    Discoverer S/T Maxx +1
    65
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online6664

    Discoverer S/T Maxx: 60% × 66.4 (est.) + 40% × 66.1 = 66

    Open Country M/T: 60% × 65.7 (est.) + 40% × 64.3 = 65

    No road tests of treadwear for Discoverer S/T Maxx. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

    No road tests of treadwear for Open Country M/T. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 51

    Handling (owners)

    Open Country M/T +12
    63
    Why this score
    SourceDiscoverer S/T MaxxOpen Country M/T
    Reviews found online5163
Scores at a glance
CategoryCooper Discoverer S/T MaxxToyo Open Country M/T
Relative Score 67 67
Dry 71 68
Wet 72 71
Snow 69 69
Comfort 59 61
Noise 59 64
Treadwear 66 65
Handling (owners) 51 63

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
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Recomputed
Headline score
± 7

Discoverer S/T Maxx

± 7

Open Country M/T

Pros, cons & observations

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

Tire A Discoverer S/T Maxx

Pros

  • Aggressive all-terrain tread pattern that excels in dirt, gravel, sand, and moderate mud
  • Surprisingly quiet and smooth ride on the highway for such a rugged tire
  • Exceptional sidewall strength and puncture resistance against sharp rocks and debris

Cons

  • Faster-than-expected tread wear for some users, particularly on heavier duty or lighter vehicles
  • Subpar wet pavement traction, specifically in cold or greasy conditions
  • Stiff ride quality and potential handling vagueness or steering pull if pressures are not meticulously tuned
All owner themes in the Discoverer S/T Maxx review

Tire B Open Country M/T

Pros

  • Exceptional off-road traction in mud, sand, gravel, and snow
  • Surprisingly low road noise and smooth ride quality for a mud-terrain tire
  • Rugged, durable sidewalls with high puncture resistance

Cons

  • High initial purchase price
  • Negative impact on vehicle fuel economy (MPG)
  • Reduced grip or slight slickness on wet pavement or icy roads
All owner themes in the Open Country M/T review

What real owners are saying

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

Tire A

Cooper Discoverer S/T Maxx

Positive

The community generally praises the Cooper Discoverer S/T Maxx for its exceptional dual-purpose performance, offering low road noise and strong traction across various off-road conditions like mud, rocks, and sand. Users note good handling while towing heavy loads, though some mention a slight softness or different feel during cornering that does not negatively impact overall safety. While initial purchase costs can be high, overall satisfaction is very high with many loyal repeat customers.

r/ToyotaTundra ·2 upvotes ·2026-10-10

“Personally a huge fan of the Cooper Discoverer S/T Maxx great on and offroad. Quite on road.”
bobistheoilguy.com ·2019-06-30

“Interesting, I'm considering a Cooper Discoverer A/T3 Sport or Discoverer S/T Maxx in 245/70r16 for my Nissan. All of the reviews are excellent and have been recommended from friends using both types, one on little Suzuki Jimny and one on GC 2.7 diesel. According to them they are great both on pavement and off road, with GC driver being long time off roader.”
duramaxforum.com ·2012-09-10

“I have the 285/75-16 Discoverer MAXX on my 05 CCSB and I love them. They ride nice, are quiet and work well when hauling my Tractor . As far as the feeling when turning they do feel a little different but it has not affected the handeling of the truck at all. I def . recommend getting this tire .”
Top themes
#on and off road traction#low road noise#heavy towing performance#durability and toughness#cornering feel#aggressive appearance

Based on 11 community posts

Tire B

Toyo Open Country M/T

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

Specs side by side

Attribute A · Cooper Discoverer S/T Maxx B · Toyo Open Country M/T
CategoryAll SeasonMud-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available3035
Rim diameters16″ – 20″16″ – 24″
Tread depth19/32″18 - 22/32″
SidewallBlack Side Wall - Raised Outline White LetteringBlack Side Wall
Max pressure35 - 80 psi35 - 80 psi
Sizes in common1919

Which one should you actually buy?

Cooper Discoverer S/T Maxx

Toyo Open Country M/T

Too close to call: Cooper Discoverer S/T Maxx and Toyo Open Country M/T are within 2 points overall. Cooper Discoverer S/T Maxx is stronger on dry. Toyo Open Country M/T is stronger on handling and noise.

Pick tire B You enjoy sharp, responsive handling

Toyo Open Country M/T scores 63 vs 51 on handling.

Pick tire B You want a quieter cabin

Toyo Open Country M/T scores 64 vs 59 on noise.

Pick tire A You want the most grip on dry roads

Cooper Discoverer S/T Maxx scores 71 vs 68 on dry.

Tire A · Cooper Discoverer S/T Maxx
Check price on Amazon
Tire B · Toyo Open Country M/T
Check price on Amazon

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Discoverer S/T Maxx or Open Country M/T?

Which is better in the wet, Discoverer S/T Maxx or Open Country M/T?

Neither, by our numbers: 72 vs 71 on the wet score, within 3 points.

Which grips better on dry roads, Discoverer S/T Maxx or Open Country M/T?

Cooper Discoverer S/T Maxx, 71 vs 68 on our dry score.

Which is better in snow, Discoverer S/T Maxx or Open Country M/T?

Neither, by our numbers: 69 vs 69 on the snow score, within 3 points.

Which is quieter, Discoverer S/T Maxx or Open Country M/T?

Toyo Open Country M/T, 64 vs 59 on our noise score.

Which is more comfortable, Discoverer S/T Maxx or Open Country M/T?

Neither, by our numbers: 59 vs 61 on the comfort score, within 3 points.

Which lasts longer, Discoverer S/T Maxx or Open Country M/T?

Neither, by our numbers: 66 vs 65 on the treadwear score, within 3 points.

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