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Cooper Discoverer AT3 LT vs Laufenn I Fit+ — Compared

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

Too close to call: Discoverer AT3 LT and I Fit+ are level at 74.

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Tire BLaufenn

I Fit+

Winter

Tests 72 · 7 tests Owners 78 · 4 reviews

Category by category

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

  1. 78

    Dry

    Discoverer AT3 LT +4
    74
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Professional tests (TWG score)–72
    Reviews found online8378
  2. 78

    Wet

    Discoverer AT3 LT +1
    77
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Professional tests (TWG score)–75
    Reviews found online8181
  3. 72

    Snow

    I Fit+ +7
    79
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Professional tests (TWG score)–78
    Reviews found online7379
  4. 72

    Comfort

    I Fit+ +1
    73
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Reviews found online7677
  5. 71

    Noise

    I Fit+ +1
    72
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Professional tests (TWG score)–76
    Reviews found online77–
  6. 71

    Treadwear

    Discoverer AT3 LT +3
    68
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Professional tests (TWG score)–65
    Reviews found online7572
  7. 71

    Handling

    I Fit+ +8
    79
    Why this score
    SourceDiscoverer AT3 LTI Fit+
    Reviews found online7179
Scores at a glance
CategoryCooper Discoverer AT3 LTLaufenn I Fit+
Relative Score 74 74
Dry 78 74
Wet 78 77
Snow 72 79
Comfort 72 73
Noise 71 72
Treadwear 71 68
Handling 71 79

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

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Recomputed
Headline score

Discoverer AT3 LT

I Fit+

Pros, cons & observations

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

Tire A 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

Tire B I Fit+

Pros

  • Exceptional traction and performance on deep snow and ice
  • Unbeatable price-to-quality ratio and overall value
  • Reliable and safe handling on dry and wet road surfaces

Cons

  • Slightly weaker performance in heavy slush
  • Difficulty in water evacuation on roads with standing water
All owner themes in the I Fit+ review

Specs side by side

Attribute A · Cooper Discoverer AT3 LT B · Laufenn I Fit+
CategoryPremium Touring All Season tireWinter
Vehicle typeSUV and 4x4Passenger Car / Crossover
Sizes available9—
Rim diameters16″ – 18″—
Tread depth16 - 17/32″—
Treadwear warranty60,000 mi—
SidewallBlack Side Wall - Raised Outline White Lettering—
Max pressure50 - 80 psi—

Which one should you actually buy?

Cooper Discoverer AT3 LT

Laufenn I Fit+

Too close to call: Cooper Discoverer AT3 LT and Laufenn I Fit+ are within 2 points overall. Cooper Discoverer AT3 LT is stronger on dry and treadwear. Laufenn I Fit+ is stronger on handling and snow.

Pick tire B You enjoy sharp, responsive handling

Laufenn I Fit+ scores 79 vs 71 on handling.

Pick tire B You drive through snowy winters

Laufenn I Fit+ scores 79 vs 72 on snow.

Pick tire A You want the most grip on dry roads

Cooper Discoverer AT3 LT scores 78 vs 74 on dry.

Pick tire A You want the longest tread life

Cooper Discoverer AT3 LT scores 71 vs 68 on treadwear.

Tire A · Cooper Discoverer AT3 LT
Check price on Amazon
Tire B · Laufenn I Fit+
Check price on Amazon

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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.

74

Too close to call

Discoverer AT3 LT

Amazon