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Cooper Discoverer AT3 XLT vs Kumho Road Venture MT51 — 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 800 + 27 owner reviews. How we score

Discoverer AT3 XLT is ahead, 78–60

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Cooper Discoverer AT3 XLT
Tire ACooper

Discoverer AT3 XLT

All-Terrain tire

± 7

Tests – · none yet Owners 82 · 800 reviews

“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”

Category by category

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

  1. 79

    Dry

    Discoverer AT3 XLT +18
    61
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 75 (est.)≈ 64 (est.)
    Reviews found online8558

    Discoverer AT3 XLT: 60% × 75.2 (est.) + 40% × 85.4 = 79

    Road Venture MT51: 60% × 63.7 (est.) + 40% × 57.7 = 61

    No road tests of dry for Discoverer AT3 XLT. 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 Road Venture MT51. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 83

    Wet

    Discoverer AT3 XLT +21
    62
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 80 (est.)≈ 64 (est.)
    Reviews found online8759

    Discoverer AT3 XLT: 60% × 79.9 (est.) + 40% × 87.4 = 83

    Road Venture MT51: 60% × 64.3 (est.) + 40% × 58.9 = 62

    No road tests of wet for Discoverer AT3 XLT. 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 Road Venture MT51. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 71

    Snow

    Discoverer AT3 XLT +8
    63
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 71 (est.)≈ 67 (est.)
    Reviews found online7258

    Discoverer AT3 XLT: 60% × 71 (est.) + 40% × 71.9 = 71

    Road Venture MT51: 60% × 66.5 (est.) + 40% × 57.8 = 63

    No road tests of snow for Discoverer AT3 XLT. 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 Road Venture MT51. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 77

    Comfort

    Discoverer AT3 XLT +19
    58
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 71 (est.)≈ 66 (est.)
    Reviews found online8054

    Discoverer AT3 XLT: 40% × 71.1 (est.) + 60% × 80.3 = 77

    Road Venture MT51: 40% × 65.6 (est.) + 60% × 53.5 = 58

    No road tests of comfort for Discoverer AT3 XLT. 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 Road Venture MT51. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 73

    Noise

    Discoverer AT3 XLT +12
    61
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online8254

    Discoverer AT3 XLT: 60% × 66.3 (est.) + 40% × 82.3 = 73

    Road Venture MT51: 60% × 66.3 (est.) + 40% × 53.6 = 61

    No road tests of noise for Discoverer AT3 XLT or Road Venture MT51. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 74

    Treadwear

    Discoverer AT3 XLT +16
    58
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Professional tests (TWG score)≈ 71 (est.)≈ 61 (est.)
    Reviews found online7952

    Discoverer AT3 XLT: 60% × 71.1 (est.) + 40% × 79.4 = 74

    Road Venture MT51: 60% × 61.4 (est.) + 40% × 52.2 = 58

    No road tests of treadwear for Discoverer AT3 XLT. 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 Road Venture MT51. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 78

    Handling (owners)

    Discoverer AT3 XLT +26
    52
    Why this score
    SourceDiscoverer AT3 XLTRoad Venture MT51
    Reviews found online7852
Scores at a glance
CategoryCooper Discoverer AT3 XLTKumho Road Venture MT51
Relative Score 78 60
Dry 79 61
Wet 83 62
Snow 71 63
Comfort 77 58
Noise 73 61
Treadwear 74 58
Handling (owners) 78 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
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Neutral
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Less important
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Neutral
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Recomputed
Headline score
± 7

Discoverer AT3 XLT

± 8

Road Venture MT51

Pros, cons & observations

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

Tire A Discoverer AT3 XLT

Pros

  • Significantly lower road noise than comparable aggressive all-terrain tires
  • Excellent wet weather, snow, and slush traction
  • Sturdy sidewalls and stable performance when towing heavy loads

Cons

  • Some users report difficulty with balancing, leading to vibrations or a rough ride
  • Tread life occasionally falls short of expectations for certain drivers
  • Can struggle or get gummed up in deep mud
All owner themes in the Discoverer AT3 XLT review

Tire B Road Venture MT51

Pros

  • Exceptionally quiet for a mud-terrain tire with minimal highway road noise
  • Strong off-road traction in thick mud, gravel, and rocky terrain
  • Competitive, budget-friendly pricing compared to premium brand alternatives

Cons

  • Reduced grip and slippery handling in heavy rain or wet road conditions
  • Increased tire noise and louder hum as the tread wears down
  • Some reports of premature wear, sidewall cracking, or lower overall mileage
All owner themes in the Road Venture MT51 review

What real owners are saying

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

Tire A

Cooper Discoverer AT3 XLT

Positive

Community members report high satisfaction with the Cooper Discoverer AT3 XLT, highlighting its quiet ride, long tread life, and strong winter performance. Several owners praise its smooth ride quality and durability under towing conditions compared to rival all-terrain tires. Discussion also commonly centers around sizing, fitment, and snow ratings.

r/ram_trucks ·22 upvotes ·2021-11-19

“New Cooper Discoverer AT3 XLT 275/75R20 these ride way better than my old Open Country A/T II”
r/Offroad ·1 upvote ·2025-10-02

“I’ve run Hankook dynapro’s, BFG ko2, Nokian outpost nat, and fallen wild peaks. Currently running Cooper discoverer AT3 XLT - they are definitely the quietest all terrains I’ve had. I would recommend them if they are available in your size - many places like simpletire or priority tire carry them.”
r/Trucks ·3 upvotes ·2021-03-26

“Are my Discoverer AT3 XLT snow rated? Going snowboarding and roads require snow tires or chains /cables. I was looking at the sidewall of my Cooper Discoverer XLT and saw there is a small M+S next to the tire size. Is it stupid to assume these are snow rated? I'm not trying to get a ticket for not having chains if I need them, which most places seem to be sold out locally.”
Top themes
#low road noise#tread longevity and wear#snow and winter traction#tire sizing and fitment#ride quality and comfort#towing performance

Based on 13 community posts

Tire B

Kumho Road Venture MT51

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

Specs side by side

Attribute A · Cooper Discoverer AT3 XLT B · Kumho Road Venture MT51
CategoryAll-Terrain tireMud-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available41
Rim diameters16″ – 20″16″
Tread depth16 - 18/32″18/32″
Treadwear warranty60,000 mi—
SidewallBlack Side Wall - Raised White LetteringBlackwall
Max pressure35 - 80 psi80 psi

Which one should you actually buy?

Cooper Discoverer AT3 XLT

Kumho Road Venture MT51

Winner: Cooper Discoverer AT3 XLT — better handling, wet and comfort. It leads or ties in every category we score.

Pick tire A You enjoy sharp, responsive handling

Cooper Discoverer AT3 XLT scores 78 vs 52 on handling.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer AT3 XLT scores 83 vs 62 on wet.

Pick tire A You want the most comfortable ride

Cooper Discoverer AT3 XLT scores 77 vs 58 on comfort.

Pick tire A You want the most grip on dry roads

Cooper Discoverer AT3 XLT scores 79 vs 61 on dry.

Tire A · Cooper Discoverer AT3 XLT
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Tire B · Kumho Road Venture MT51
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Discoverer AT3 XLT or Road Venture MT51?

Which is better in the wet, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 83 vs 62 on our wet score.

Which grips better on dry roads, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 79 vs 61 on our dry score.

Which is better in snow, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 71 vs 63 on our snow score.

Which is quieter, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 73 vs 61 on our noise score.

Which is more comfortable, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 77 vs 58 on our comfort score.

Which lasts longer, Discoverer AT3 XLT or Road Venture MT51?

Cooper Discoverer AT3 XLT, 74 vs 58 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