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

Too close to call: Open Country M/T 68, Discoverer S/T Maxx 67.

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Toyo Open Country M/T
Tire AToyo

Open Country M/T

Mud-Terrain tire

± 7

Tests – · none yet Owners 67 · 241 reviews

Cooper Discoverer S/T Maxx
Tire BCooper

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.”

Category by category

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

  1. 68

    Dry

    Discoverer S/T Maxx +3
    71
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 68 (est.)≈ 70 (est.)
    Reviews found online6973

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

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

    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 0.41).

    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 0.41).

  2. 72

    Wet

    Level
    72
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 71 (est.)≈ 72 (est.)
    Reviews found online7273

    Open Country M/T: 60% × 71.3 (est.) + 40% × 71.8 = 72

    Discoverer S/T Maxx: 60% × 71.9 (est.) + 40% × 72.8 = 72

    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).

    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).

  3. 68

    Snow

    Discoverer S/T Maxx +1
    69
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 69 (est.)≈ 70 (est.)
    Reviews found online6767

    Open Country M/T: 60% × 69.4 (est.) + 40% × 67.1 = 68

    Discoverer S/T Maxx: 60% × 69.5 (est.) + 40% × 67.4 = 69

    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).

    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).

  4. 62

    Comfort

    Open Country M/T +3
    59
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 67 (est.)≈ 66 (est.)
    Reviews found online5855

    Open Country M/T: 40% × 66.6 (est.) + 60% × 58.2 = 62

    Discoverer S/T Maxx: 40% × 65.8 (est.) + 60% × 54.7 = 59

    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).

    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).

  5. 64

    Noise

    Open Country M/T +5
    59
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online6048

    Open Country M/T: 60% × 66.4 (est.) + 40% × 59.6 = 64

    Discoverer S/T Maxx: 60% × 66.4 (est.) + 40% × 47.5 = 59

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

  6. 65

    Treadwear

    Discoverer S/T Maxx +1
    66
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online6466

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

    Discoverer S/T Maxx: 60% × 66.4 (est.) + 40% × 66.2 = 66

    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).

    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).

  7. 63

    Handling (owners)

    Open Country M/T +11
    52
    Why this score
    SourceOpen Country M/TDiscoverer S/T Maxx
    Reviews found online6352
Scores at a glance
CategoryToyo Open Country M/TCooper Discoverer S/T Maxx
Relative Score 68 67
Dry 68 71
Wet 72 72
Snow 68 69
Comfort 62 59
Noise 64 59
Treadwear 65 66
Handling (owners) 63 52

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.

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Neutral
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Neutral
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Recomputed
Headline score
± 7

Open Country M/T

± 7

Discoverer S/T Maxx

Pros, cons & observations

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

Tire A 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

Tire B 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

What real owners are saying

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

Tire A

Toyo Open Country M/T

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

Tire B

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.

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.”
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.”
duramaxforum.com ·2012-09-10

“I have 285/75-r16 on my f-150 and love them. I've put them through hell (rocks, mud, sand, rim breaking in half and truck skidding down the road on it) and the have held up amazing. My old set of cooper st's last around 60k and still had a little life left. Ill never run any thing but coopers now. and for the record i had that tire checked out by 3 different tire shops and they all said it was fine.”
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

Specs side by side

Attribute A · Toyo Open Country M/T B · Cooper Discoverer S/T Maxx
CategoryMud-Terrain tireAll Season
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available3530
Rim diameters16″ – 24″16″ – 20″
Tread depth18 - 22/32″19/32″
SidewallBlack Side WallBlack Side Wall - Raised Outline White Lettering
Max pressure35 - 80 psi35 - 80 psi
Sizes in common1919

Which one should you actually buy?

Toyo Open Country M/T

Cooper Discoverer S/T Maxx

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

Pick tire A You enjoy sharp, responsive handling

Toyo Open Country M/T scores 63 vs 52 on handling.

Pick tire A You want a quieter cabin

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

Pick tire A You want the most comfortable ride

Toyo Open Country M/T scores 62 vs 59 on comfort.

Pick tire B You want the most grip on dry roads

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

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

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

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

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

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

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

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

Neither, by our numbers: 68 vs 69 on the snow score, within 3 points.

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

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

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

Toyo Open Country M/T, 62 vs 59 on our comfort score.

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

Neither, by our numbers: 65 vs 66 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