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Head-to-head Updated

Cooper Discoverer S/T Maxx vs Toyo Open Country R/T Pro — 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 + 7 owner reviews. How we score

Open Country R/T Pro leads, 71–68 Narrow edge

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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.”

Category by category

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

  1. 71

    Dry

    Level
    71
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 70 (est.)≈ 70 (est.)
    Reviews found online7373

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

    Open Country R/T Pro: 60% × 69.9 (est.) + 40% × 72.7 = 71

    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).

    No road tests of dry for Open Country R/T Pro. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 72

    Wet

    Open Country R/T Pro +3
    75
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 72 (est.)≈ 74 (est.)
    Reviews found online7377

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

    Open Country R/T Pro: 60% × 74 (est.) + 40% × 76.8 = 75

    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 R/T Pro. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 69

    Snow

    Open Country R/T Pro +2
    71
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 69 (est.)≈ 71 (est.)
    Reviews found online6771

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

    Open Country R/T Pro: 60% × 70.7 (est.) + 40% × 71.3 = 71

    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 R/T Pro. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 59

    Comfort

    Open Country R/T Pro +5
    64
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 66 (est.)≈ 67 (est.)
    Reviews found online5562

    Discoverer S/T Maxx: 40% × 65.9 (est.) + 60% × 54.6 = 59

    Open Country R/T Pro: 40% × 67.4 (est.) + 60% × 62.2 = 64

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

  5. 59

    Noise

    Open Country R/T Pro +8
    67
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online4868

    Discoverer S/T Maxx: 60% × 66.5 (est.) + 40% × 47.5 = 59

    Open Country R/T Pro: 60% × 66.5 (est.) + 40% × 68 = 67

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

  6. 66

    Treadwear

    Open Country R/T Pro +1
    67
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Professional tests (TWG score)≈ 66 (est.)≈ 67 (est.)
    Reviews found online6668

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

    Open Country R/T Pro: 60% × 67 (est.) + 40% × 67.9 = 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 0.36).

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

  7. 52

    Handling (owners)

    No comparison
    –
    Why this score
    SourceDiscoverer S/T MaxxOpen Country R/T Pro
    Reviews found online52–
Scores at a glance
CategoryCooper Discoverer S/T MaxxToyo Open Country R/T Pro
Relative Score 68 71
Dry 71 71
Wet 72 75
Snow 69 71
Comfort 59 64
Noise 59 67
Treadwear 66 67
Handling (owners) 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.

Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost

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

Recomputed
Headline score
± 7

Discoverer S/T Maxx

± 8

Open Country R/T Pro

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 R/T Pro

Pros

  • Aggressive and attractive styling with large sidewall lugs
  • Surprisingly quiet and smooth ride on the highway for an RT tire
  • High overall user satisfaction regarding appearance and initial performance

Cons

  • Difficulty balancing tires properly, leading to a persistent vibration or shake
  • Initial concerns regarding long-term tread wear durability
All owner themes in the Open Country R/T Pro 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 R/T Pro

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 R/T Pro
CategoryAll SeasonAll-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available3027
Rim diameters16″ – 20″17″ – 24″
Tread depth19/32″17 - 20/32″
Treadwear warranty—45,000 mi
SidewallBlack Side Wall - Raised Outline White LetteringBlack Side Wall
Max pressure35 - 80 psi35 - 80 psi
Sizes in common1212

Which one should you actually buy?

Cooper Discoverer S/T Maxx

Toyo Open Country R/T Pro

Narrow edge: Toyo Open Country R/T Pro — better noise, comfort and wet. It leads or ties in every category we score. Toyo Open Country R/T Pro rests on little evidence so far (0 tests, 7 reviews), so read this result as provisional.

Pick tire B You want a quieter cabin

Toyo Open Country R/T Pro scores 67 vs 59 on noise.

Pick tire B You want the most comfortable ride

Toyo Open Country R/T Pro scores 64 vs 59 on comfort.

Pick tire B Your priority is wet-weather safety

Toyo Open Country R/T Pro scores 75 vs 72 on wet.

Tire A · Cooper Discoverer S/T Maxx
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Tire B · Toyo Open Country R/T Pro
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Discoverer S/T Maxx or Open Country R/T Pro?

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

Toyo Open Country R/T Pro, 75 vs 72 on our wet score.

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

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

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

Neither, by our numbers: 69 vs 71 on the snow score, within 3 points.

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

Toyo Open Country R/T Pro, 67 vs 59 on our noise score.

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

Toyo Open Country R/T Pro, 64 vs 59 on our comfort score.

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

Neither, by our numbers: 66 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