tirewheelguide
Head-to-head Updated

Dunlop Grandtrek AT20 vs Dunlop SP Sport Maxx TT — Compared

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

SP Sport Maxx TT is ahead, 63–45

Check price on Amazon · SP Sport Maxx TT or Grandtrek AT20 on Amazon
Add your size for an exact match
/R

Both Amazon links then search this exact size.

TireWheelGuide may earn a commission from purchases made through these links.

Category by category

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

  1. 43

    Dry

    SP Sport Maxx TT +23
    66
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online2965
  2. 43

    Wet

    SP Sport Maxx TT +23
    66
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online3364
  3. 49

    Snow

    No comparison
    –
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online36–
  4. 52

    Comfort

    SP Sport Maxx TT +9
    61
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online3454
  5. 57

    Noise

    No comparison
    –
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online42–
  6. 52

    Treadwear

    SP Sport Maxx TT +6
    58
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online4253
  7. 34

    Handling

    SP Sport Maxx TT +27
    61
    Why this score
    SourceGrandtrek AT20SP Sport Maxx TT
    Reviews found online3461
Scores at a glance
CategoryDunlop Grandtrek AT20Dunlop SP Sport Maxx TT
Relative Score 45 63
Dry 43 66
Wet 43 66
Snow 49 –
Comfort 52 61
Noise 57 –
Treadwear 52 58
Handling 34 61

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
NoneLessNeutralMoreMost
Important
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost

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

Less important
NoneLessNeutralMoreMost
Less important
NoneLessNeutralMoreMost

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

Important
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Recomputed
Headline score

Grandtrek AT20

SP Sport Maxx TT

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 SP Sport Maxx TT

Pros

  • Exceptional dry grip and precise cornering stability
  • Stiff sidewalls providing sharp steering feedback and confidence
  • Better-than-average tread life and mileage for many everyday drivers

Cons

  • High levels of road noise and cabin hum at speeds above 50 mph
  • Stiff, harsh ride quality, particularly with run-flat variants
  • Inconsistent or poor grip in wet, damp, or cold weather conditions
All owner themes in the SP Sport Maxx TT review

Specs side by side

Attribute A · Dunlop Grandtrek AT20 B · Dunlop SP Sport Maxx TT
CategoryAll SeasonSummer
Vehicle typeSUV and 4x4Passenger Car / Crossover
Sizes available95
Rim diameters15″ – 18″16″ – 18″
SidewallBlackwall—

Which one should you actually buy?

Dunlop Grandtrek AT20

Dunlop SP Sport Maxx TT

Winner: Dunlop SP Sport Maxx TT — better handling, dry and wet. It leads or ties in every category we score.

Pick tire B You enjoy sharp, responsive handling

Dunlop SP Sport Maxx TT scores 61 vs 34 on handling.

Pick tire B You want the most grip on dry roads

Dunlop SP Sport Maxx TT scores 66 vs 43 on dry.

Pick tire B Your priority is wet-weather safety

Dunlop SP Sport Maxx TT scores 66 vs 43 on wet.

Pick tire B You want the most comfortable ride

Dunlop SP Sport Maxx TT scores 61 vs 52 on comfort.

Tire A · Dunlop Grandtrek AT20
Check price on Amazon
Tire B · Dunlop SP Sport Maxx TT
Check price on Amazon

TireWheelGuide may earn a commission from purchases made through these links.

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.

63

Leads

SP Sport Maxx TT

Amazon