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Head-to-head Updated

Dunlop Grandtrek ST30 vs Dunlop Grandtrek ST20 — 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 27 + 9 owner reviews. How we score

Grandtrek ST20 is ahead, 70–48

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Dunlop Grandtrek ST20
Tire BDunlop

Grandtrek ST20

All Season

± 8Provisional

Tests – · none yet Owners 71 · 9 reviews

Category by category

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

  1. 49

    Dry

    Grandtrek ST20 +20
    69
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 56 (est.)≈ 68 (est.)
    Reviews found online3969

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

    Grandtrek ST20: 60% × 68.4 (est.) + 40% × 69 = 69

    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).

    No road tests of dry for Grandtrek ST20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 51

    Wet

    Grandtrek ST20 +21
    72
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 56 (est.)≈ 72 (est.)
    Reviews found online4473

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

    Grandtrek ST20: 60% × 72 (est.) + 40% × 73.1 = 72

    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).

    No road tests of wet for Grandtrek ST20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 54

    Snow

    No comparison
    –
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 62 (est.)–
    Reviews found online43–

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

    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. 46

    Comfort

    Grandtrek ST20 +22
    68
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 62 (est.)≈ 68 (est.)
    Reviews found online3567

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

    Grandtrek ST20: 40% × 68.3 (est.) + 60% × 67.1 = 68

    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).

    No road tests of comfort for Grandtrek ST20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 52

    Noise

    No comparison
    –
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 66 (est.)–
    Reviews found online29–

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

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

  6. 47

    Treadwear

    Grandtrek ST20 +22
    69
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Professional tests (TWG score)≈ 55 (est.)≈ 68 (est.)
    Reviews found online3571

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

    Grandtrek ST20: 60% × 68.2 (est.) + 40% × 71.2 = 69

    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).

    No road tests of treadwear for Grandtrek ST20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 42

    Handling (owners)

    Grandtrek ST20 +29
    71
    Why this score
    SourceGrandtrek ST30Grandtrek ST20
    Reviews found online4271
Scores at a glance
CategoryDunlop Grandtrek ST30Dunlop Grandtrek ST20
Relative Score 48 70
Dry 49 69
Wet 51 72
Snow 54 –
Comfort 46 68
Noise 52 –
Treadwear 47 69
Handling (owners) 42 71

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

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

Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost

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

Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
± 8

Grandtrek ST30

± 8

Grandtrek ST20

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 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

Tire B Grandtrek ST20

Pros

  • Impressive tread life and overall durability
  • Consistent and predictable handling in mixed weather conditions
  • Strong performance for light off-road and towing applications

Cons

  • Noticeable reduction in wet grip at lower tread depths (below 3mm)
  • Tendency for sidewalls to develop cracks or crazing over time
  • Increased road noise on rough or concrete surfaces
All owner themes in the Grandtrek ST20 review

Specs side by side

Attribute A · Dunlop Grandtrek ST30 B · Dunlop Grandtrek ST20
CategoryAll SeasonAll Season
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available53
Rim diameters17″ – 19″16″ – 17″
Tread depth10/32″—
UTQG360 A A300 B A - B
SidewallBlackwall—
Max pressure51 psi—
Sizes in common00

Which one should you actually buy?

Dunlop Grandtrek ST30

Dunlop Grandtrek ST20

Winner: Dunlop Grandtrek ST20 — better handling, comfort and treadwear. It leads or ties in every category we score. Dunlop Grandtrek ST20 rests on little evidence so far (0 tests, 9 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Dunlop Grandtrek ST20 scores 71 vs 42 on handling.

Pick tire B You want the most comfortable ride

Dunlop Grandtrek ST20 scores 68 vs 46 on comfort.

Pick tire B You want the longest tread life

Dunlop Grandtrek ST20 scores 69 vs 47 on treadwear.

Pick tire B Your priority is wet-weather safety

Dunlop Grandtrek ST20 scores 72 vs 51 on wet.

Tire A · Dunlop Grandtrek ST30
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Tire B · Dunlop Grandtrek ST20
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Grandtrek ST30 or Grandtrek ST20?

Which is better in the wet, Grandtrek ST30 or Grandtrek ST20?

Dunlop Grandtrek ST20, 72 vs 51 on our wet score.

Which grips better on dry roads, Grandtrek ST30 or Grandtrek ST20?

Dunlop Grandtrek ST20, 69 vs 49 on our dry score.

Which is more comfortable, Grandtrek ST30 or Grandtrek ST20?

Dunlop Grandtrek ST20, 68 vs 46 on our comfort score.

Which lasts longer, Grandtrek ST30 or Grandtrek ST20?

Dunlop Grandtrek ST20, 69 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