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Head-to-head Updated

Dunlop Grandtrek AT20 vs General Altimax One S — Compared

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

Altimax One S is ahead, 66–45

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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. 43

    Dry

    Altimax One S +16
    59
    Why this score
    SourceGrandtrek AT20Altimax One S
    Professional tests (TWG score)–50
    Reviews found online2972
  2. 43

    Wet

    Altimax One S +21
    64
    Why this score
    SourceGrandtrek AT20Altimax One S
    Professional tests (TWG score)–59
    Reviews found online3372
  3. 49

    Snow

    No comparison
    –
    Why this score
    SourceGrandtrek AT20Altimax One S
    Reviews found online36–
  4. 51

    Comfort

    Altimax One S +17
    68
    Why this score
    SourceGrandtrek AT20Altimax One S
    Reviews found online3467
  5. 57

    Noise

    No comparison
    –
    Why this score
    SourceGrandtrek AT20Altimax One S
    Reviews found online42–
  6. 52

    Treadwear

    Altimax One S +19
    71
    Why this score
    SourceGrandtrek AT20Altimax One S
    Professional tests (TWG score)–72
    Reviews found online4271
  7. 34

    Handling

    Altimax One S +36
    70
    Why this score
    SourceGrandtrek AT20Altimax One S
    Reviews found online3470
Scores at a glance
CategoryDunlop Grandtrek AT20General Altimax One S
Relative Score 45 66
Dry 43 59
Wet 43 64
Snow 49 –
Comfort 51 68
Noise 57 –
Treadwear 52 71
Handling 34 70

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

Weight the categories that matter to you

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

Important
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Important
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Neutral
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Neither tire has a score here yet, so this weight changes nothing.

Less important
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Less important
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Neither tire has a score here yet, so this weight changes nothing.

Important
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Neutral
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Recomputed
Headline score

Grandtrek AT20

Altimax One S

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 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 Altimax One S

Pros

  • Exceptional wet-weather grip and high driver confidence in the rain
  • High level of ride comfort and quietness for most daily driving conditions
  • Good tread wear longevity and overall value for money compared to premium brands

Cons

  • Notable tire and road noise reported by multiple users
  • Unresponsive steering feel and lack of sporty handling characteristics
  • Very soft sidewalls that are vulnerable to punctures from minor hazards like thorns
All owner themes in the Altimax One S review

Specs side by side

Attribute A · Dunlop Grandtrek AT20 B · General Altimax One S
CategoryAll SeasonSummer
Vehicle typeSUV and 4x4Passenger Car / Crossover
Sizes available981
Rim diameters15″ – 18″15″ – 20″
SidewallBlackwall—

Which one should you actually buy?

Dunlop Grandtrek AT20

General Altimax One S

Winner: General Altimax One S — better handling, wet and treadwear. It leads or ties in every category we score.

Pick tire B You enjoy sharp, responsive handling

General Altimax One S scores 70 vs 34 on handling.

Pick tire B Your priority is wet-weather safety

General Altimax One S scores 64 vs 43 on wet.

Pick tire B You want the longest tread life

General Altimax One S scores 71 vs 52 on treadwear.

Pick tire B You want the most comfortable ride

General Altimax One S scores 68 vs 51 on comfort.

Tire A · Dunlop Grandtrek AT20
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Tire B · General Altimax One S
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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.

66

Leads

Altimax One S

Amazon