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Cooper Discoverer STT PRO vs Cooper Discoverer AT3 LT — Compared

Relative Score (0–100): 60% professional tests, 40% owner reviews.

Discoverer AT3 LT is ahead, 75–64

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Tire ACooper

Discoverer STT PRO

All Season All Terrain and Off Road tires

Tests – · none yet Owners 63 · 409 reviews

Category by category

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

  1. 67

    Dry

    Discoverer AT3 LT +11
    78
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online6783
  2. 69

    Wet

    Discoverer AT3 LT +11
    80
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online6883
  3. 67

    Snow

    Discoverer AT3 LT +5
    72
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online6572
  4. 62

    Comfort

    Discoverer AT3 LT +10
    72
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online5575
  5. 54

    Noise

    Discoverer AT3 LT +17
    71
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online3977
  6. 64

    Treadwear

    Discoverer AT3 LT +7
    71
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online6375
  7. 57

    Handling

    Discoverer AT3 LT +15
    72
    Why this score
    SourceDiscoverer STT PRODiscoverer AT3 LT
    Reviews found online5772
Scores at a glance
CategoryCooper Discoverer STT PROCooper Discoverer AT3 LT
Relative Score 64 75
Dry 67 78
Wet 69 80
Snow 67 72
Comfort 62 72
Noise 54 71
Treadwear 64 71
Handling 57 72

Higher is better. The Relative Score follows your weights below; category scores do not change.

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Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.

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Recomputed
Headline score

Discoverer STT PRO

Discoverer AT3 LT

Pros, cons & observations

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

Tire A Discoverer STT PRO

Pros

  • Outstanding off-road traction in mud, rocks, and dirt
  • Surprisingly low road noise and smooth ride for a mud-terrain tire
  • Aggressive and appealing visual design with tough sidewalls

Cons

  • Can be difficult to balance properly, leading to vibrations for some users
  • Faster tread wear reported by a subset of drivers under heavy use
  • Reduced traction in specific conditions like deep sand or packed snow/ice
All owner themes in the Discoverer STT PRO review

Tire B Discoverer AT3 LT

Pros

  • Excellent towing stability with minimal sidewall flex under heavy loads
  • Surprisingly quiet and smooth on the highway for an all-terrain tire
  • Strong durability and wear resistance on rough gravel, rock, and dirt roads

Cons

  • Subpar performance in heavy snow, ice, or deep mud for some users
  • Occasional reports of balancing difficulties or initial cold-weather tire thumping
  • Isolated incidents of sidewall splitting or premature wear
All owner themes in the Discoverer AT3 LT review

Specs side by side

Attribute A · Cooper Discoverer STT PRO B · Cooper Discoverer AT3 LT
CategoryAll Season All Terrain and Off Road tiresPremium Touring All Season tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available239
Rim diameters16″ – 20″16″ – 18″
Tread depth18 - 22/32″16 - 17/32″
Treadwear warranty—60,000 mi
SidewallBlack Side Wall - Raised White LetteringBlack Side Wall - Raised Outline White Lettering
Max pressure35 - 80 psi50 - 80 psi

Which one should you actually buy?

Cooper Discoverer STT PRO

Cooper Discoverer AT3 LT

Winner: Cooper Discoverer AT3 LT — better noise, handling and dry. It leads or ties in every category we score.

Pick tire B You want a quieter cabin

Cooper Discoverer AT3 LT scores 71 vs 54 on noise.

Pick tire B You enjoy sharp, responsive handling

Cooper Discoverer AT3 LT scores 72 vs 57 on handling.

Pick tire B You want the most grip on dry roads

Cooper Discoverer AT3 LT scores 78 vs 67 on dry.

Pick tire B Your priority is wet-weather safety

Cooper Discoverer AT3 LT scores 80 vs 69 on wet.

Tire A · Cooper Discoverer STT PRO
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Tire B · Cooper Discoverer AT3 LT
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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.

Community buzz from Reddit and forums is shown for context only — it never changes the score.

75

Leads

Discoverer AT3 LT

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