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Dunlop Grandtrek AT20 vs Dunlop Grandtrek ST30 — 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 59 + 27 owner reviews. How we score

Grandtrek ST30 is ahead, 49–44

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Category by category

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

  1. 41

    Dry

    Grandtrek ST30 +8
    49
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 51 (est.)≈ 56 (est.)
    Reviews found online2739

    Grandtrek AT20: 60% × 51.1 (est.) + 40% × 27 = 41

    Grandtrek ST30: 60% × 55.8 (est.) + 40% × 38.5 = 49

    No road tests of dry for Grandtrek AT20. 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 Grandtrek ST30. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 41

    Wet

    Grandtrek ST30 +10
    51
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 49 (est.)≈ 56 (est.)
    Reviews found online3044

    Grandtrek AT20: 60% × 48.5 (est.) + 40% × 30.1 = 41

    Grandtrek ST30: 60% × 55.9 (est.) + 40% × 43.5 = 51

    No road tests of wet for Grandtrek AT20. 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 Grandtrek ST30. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 50

    Snow

    Grandtrek ST30 +4
    54
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 59 (est.)≈ 62 (est.)
    Reviews found online3543

    Grandtrek AT20: 60% × 59.3 (est.) + 40% × 35.3 = 50

    Grandtrek ST30: 60% × 61.7 (est.) + 40% × 42.9 = 54

    No road tests of snow for Grandtrek AT20. 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 Grandtrek ST30. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 42

    Comfort

    Grandtrek ST30 +4
    46
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 61 (est.)≈ 62 (est.)
    Reviews found online2935

    Grandtrek AT20: 40% × 60.7 (est.) + 60% × 28.9 = 42

    Grandtrek ST30: 40% × 61.8 (est.) + 60% × 34.7 = 46

    No road tests of comfort for Grandtrek AT20. 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 Grandtrek ST30. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 55

    Noise

    Grandtrek AT20 +3
    52
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online3929

    Grandtrek AT20: 60% × 66.4 (est.) + 40% × 38.7 = 55

    Grandtrek ST30: 60% × 66.4 (est.) + 40% × 29.2 = 52

    No road tests of noise for Grandtrek AT20 or Grandtrek ST30. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 51

    Treadwear

    Grandtrek AT20 +4
    47
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Professional tests (TWG score)≈ 58 (est.)≈ 55 (est.)
    Reviews found online4235

    Grandtrek AT20: 60% × 57.7 (est.) + 40% × 42.1 = 51

    Grandtrek ST30: 60% × 54.9 (est.) + 40% × 34.5 = 47

    No road tests of treadwear for Grandtrek AT20. 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 Grandtrek ST30. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 32

    Handling (owners)

    Grandtrek ST30 +10
    42
    Why this score
    SourceGrandtrek AT20Grandtrek ST30
    Reviews found online3242
Scores at a glance
CategoryDunlop Grandtrek AT20Dunlop Grandtrek ST30
Relative Score 44 49
Dry 41 49
Wet 41 51
Snow 50 54
Comfort 42 46
Noise 55 52
Treadwear 51 47
Handling (owners) 32 42

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
Recomputed
Headline score
± 7

Grandtrek AT20

± 7

Grandtrek ST30

Pros, cons & observations

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

Tire A Grandtrek AT20

Pros

  • Exceptional tread life and high mileage capability (often exceeding 40,000 to 60,000+ miles)
  • Comfortable, smooth, and quiet ride on tarmac and highways
  • Good stability and predictable handling in dry, warm weather conditions

Cons

  • Extremely poor and potentially unsafe traction on wet roads, leading to sliding and long braking distances
  • Unreliable or hazardous performance in winter conditions like snow and ice
  • Subpar off-road capabilities, including low puncture resistance on gravel and poor traction in mud or sand
All owner themes in the Grandtrek AT20 review

Tire B Grandtrek ST30

Pros

  • Strong dry-pavement grip and straight-line stability
  • Competitive price point and value for money
  • High mileage potential for some drivers

Cons

  • Poor wet-weather performance and susceptibility to aquaplaning
  • High levels of road noise on various surfaces
  • Inconsistent tread life, with reports of rapid wear
All owner themes in the Grandtrek ST30 review

Specs side by side

Attribute A · Dunlop Grandtrek AT20 B · Dunlop Grandtrek ST30
CategoryAll-Terrain tireAll Season
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available95
Rim diameters15″ – 18″17″ – 19″
Tread depth—10/32″
UTQG300 - 360 B A - B360 A A
SidewallBlackwallBlackwall
Max pressure—51 psi
Sizes in common11

Which one should you actually buy?

Dunlop Grandtrek AT20

Dunlop Grandtrek ST30

Winner: Dunlop Grandtrek ST30 — better wet, handling and dry. Pick the Dunlop Grandtrek AT20 if treadwear and noise matter most to you.

Pick tire B Your priority is wet-weather safety

Dunlop Grandtrek ST30 scores 51 vs 41 on wet.

Pick tire B You enjoy sharp, responsive handling

Dunlop Grandtrek ST30 scores 42 vs 32 on handling.

Pick tire B You want the most grip on dry roads

Dunlop Grandtrek ST30 scores 49 vs 41 on dry.

Pick tire A You want the longest tread life

Dunlop Grandtrek AT20 scores 51 vs 47 on treadwear.

Tire A · Dunlop Grandtrek AT20
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Tire B · Dunlop Grandtrek ST30
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Grandtrek AT20 or Grandtrek ST30?

Which is better in the wet, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek ST30, 51 vs 41 on our wet score.

Which grips better on dry roads, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek ST30, 49 vs 41 on our dry score.

Which is better in snow, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek ST30, 54 vs 50 on our snow score.

Which is quieter, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek AT20, 55 vs 52 on our noise score.

Which is more comfortable, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek ST30, 46 vs 42 on our comfort score.

Which lasts longer, Grandtrek AT20 or Grandtrek ST30?

Dunlop Grandtrek AT20, 51 vs 47 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