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Head-to-head Updated

Cooper Discoverer S/T Maxx vs Toyo Open Country All Terrain — 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 325 + 16 owner reviews. How we score

Too close to call: Discoverer S/T Maxx 67, Open Country All Terrain 66.

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

Discoverer S/T Maxx

All Season

± 7

Tests – · none yet Owners 66 · 325 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. 71

    Dry

    Discoverer S/T Maxx +6
    65
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 70 (est.)≈ 66 (est.)
    Reviews found online7363

    Discoverer S/T Maxx: 60% × 70.1 (est.) + 40% × 72.8 = 71

    Open Country All Terrain: 60% × 66 (est.) + 40% × 63.1 = 65

    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 All Terrain. 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 +4
    68
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 72 (est.)≈ 69 (est.)
    Reviews found online7367

    Discoverer S/T Maxx: 60% × 71.8 (est.) + 40% × 72.6 = 72

    Open Country All Terrain: 60% × 68.7 (est.) + 40% × 67.1 = 68

    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 All Terrain. 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 +4
    64
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 69 (est.)≈ 66 (est.)
    Reviews found online6759

    Discoverer S/T Maxx: 60% × 69.4 (est.) + 40% × 67.1 = 68

    Open Country All Terrain: 60% × 66.5 (est.) + 40% × 59.3 = 64

    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 0.37).

    No road tests of snow for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

  4. 59

    Comfort

    Open Country All Terrain +6
    65
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 66 (est.)≈ 68 (est.)
    Reviews found online5464

    Discoverer S/T Maxx: 40% × 66.3 (est.) + 60% × 53.7 = 59

    Open Country All Terrain: 40% × 68.1 (est.) + 60% × 63.6 = 65

    No road tests of comfort for Discoverer S/T Maxx or Open Country All Terrain. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 59

    Noise

    No comparison
    –
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 67 (est.)–
    Reviews found online48–

    Discoverer S/T Maxx: 60% × 66.6 (est.) + 40% × 47.5 = 59

    No road tests of noise for Discoverer S/T Maxx. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 65

    Treadwear

    Open Country All Terrain +2
    67
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online6567

    Discoverer S/T Maxx: 60% × 65.7 (est.) + 40% × 65 = 65

    Open Country All Terrain: 60% × 66.4 (est.) + 40% × 66.8 = 67

    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 0.35).

    No road tests of treadwear for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  7. 50

    Handling (owners)

    Open Country All Terrain +13
    63
    Why this score
    SourceDiscoverer S/T MaxxOpen Country All Terrain
    Reviews found online5063
Scores at a glance
CategoryCooper Discoverer S/T MaxxToyo Open Country All Terrain
Relative Score 67 66
Dry 71 65
Wet 72 68
Snow 68 64
Comfort 59 65
Noise 59 –
Treadwear 65 67
Handling (owners) 50 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

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
± 7

Discoverer S/T Maxx

± 8

Open Country All Terrain

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 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 All Terrain

Pros

  • Exceptional performance and traction in deep snow and winter conditions
  • Impressive tread life and overall longevity with proper maintenance
  • Low road noise and high comfort levels during normal highway driving

Cons

  • Subpar grip and traction in wet road conditions reported by some users
  • Vulnerability and poor durability regarding sidewall damage
  • Relatively high purchase price compared to competitors or perceived value
All owner themes in the Open Country All Terrain 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.”
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.”
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 All Terrain

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 All Terrain
CategoryAll SeasonAll-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available30—
Rim diameters16″ – 20″—
Tread depth19/32″—
SidewallBlack Side Wall - Raised Outline White Lettering—
Max pressure35 - 80 psi—

Which one should you actually buy?

Cooper Discoverer S/T Maxx

Toyo Open Country All Terrain

Too close to call: Cooper Discoverer S/T Maxx and Toyo Open Country All Terrain are within 2 points overall. Cooper Discoverer S/T Maxx is stronger on dry, wet and snow. Toyo Open Country All Terrain is stronger on handling and comfort. Toyo Open Country All Terrain rests on little evidence so far (0 tests, 16 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Toyo Open Country All Terrain scores 63 vs 50 on handling.

Pick tire A You want the most grip on dry roads

Cooper Discoverer S/T Maxx scores 71 vs 65 on dry.

Pick tire B You want the most comfortable ride

Toyo Open Country All Terrain scores 65 vs 59 on comfort.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer S/T Maxx scores 72 vs 68 on wet.

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

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Discoverer S/T Maxx or Open Country All Terrain?

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

Cooper Discoverer S/T Maxx, 72 vs 68 on our wet score.

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

Cooper Discoverer S/T Maxx, 71 vs 65 on our dry score.

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

Cooper Discoverer S/T Maxx, 68 vs 64 on our snow score.

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

Toyo Open Country All Terrain, 65 vs 59 on our comfort score.

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

Neither, by our numbers: 65 vs 67 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