tirewheelguide
Head-to-head Updated

Cooper Discoverer H/T Plus vs Dunlop Grandtrek SJ6 — 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 34 + 6 owner reviews. How we score

Discoverer H/T Plus is ahead, 59–54

Check price on Amazon · Discoverer H/T Plus or Grandtrek SJ6 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.

Dunlop Grandtrek SJ6
Tire BDunlop

Grandtrek SJ6

Winter Premium Touring tires

± 8Provisional

Tests – · none yet Owners 47 · 6 reviews

Category by category

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

  1. 64

    Dry

    Discoverer H/T Plus +12
    52
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 66 (est.)≈ 57 (est.)
    Reviews found online6243

    Discoverer H/T Plus: 60% × 65.6 (est.) + 40% × 62.1 = 64

    Grandtrek SJ6: 60% × 57.5 (est.) + 40% × 42.8 = 52

    No road tests of dry for Discoverer H/T Plus. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

    No road tests of dry for Grandtrek SJ6. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 60

    Wet

    Discoverer H/T Plus +6
    54
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 63 (est.)≈ 58 (est.)
    Reviews found online5748

    Discoverer H/T Plus: 60% × 62.9 (est.) + 40% × 56.6 = 60

    Grandtrek SJ6: 60% × 58.2 (est.) + 40% × 48.1 = 54

    No road tests of wet for Discoverer H/T Plus. 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 SJ6. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 54

    Snow

    Grandtrek SJ6 +4
    58
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 61 (est.)≈ 63 (est.)
    Reviews found online4351

    Discoverer H/T Plus: 60% × 60.5 (est.) + 40% × 43.4 = 54

    Grandtrek SJ6: 60% × 63.3 (est.) + 40% × 50.8 = 58

    No road tests of snow for Discoverer H/T Plus. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

    No road tests of snow for Grandtrek SJ6. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

  4. 63

    Comfort

    Discoverer H/T Plus +10
    53
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 67 (est.)≈ 65 (est.)
    Reviews found online5946

    Discoverer H/T Plus: 40% × 67.3 (est.) + 60% × 59.4 = 63

    Grandtrek SJ6: 40% × 64.8 (est.) + 60% × 45.8 = 53

    No road tests of comfort for Discoverer H/T Plus or Grandtrek SJ6. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 65

    Noise

    Discoverer H/T Plus +6
    59
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 67 (est.)≈ 67 (est.)
    Reviews found online6249

    Discoverer H/T Plus: 60% × 66.6 (est.) + 40% × 61.8 = 65

    Grandtrek SJ6: 60% × 66.6 (est.) + 40% × 48.7 = 59

    No road tests of noise for Discoverer H/T Plus or Grandtrek SJ6. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 51

    Treadwear

    Grandtrek SJ6 +3
    54
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Professional tests (TWG score)≈ 57 (est.)≈ 59 (est.)
    Reviews found online4146

    Discoverer H/T Plus: 60% × 57.4 (est.) + 40% × 40.9 = 51

    Grandtrek SJ6: 60% × 59 (est.) + 40% × 45.7 = 54

    No road tests of treadwear for Discoverer H/T Plus. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

    No road tests of treadwear for Grandtrek SJ6. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  7. 53

    Handling (owners)

    Discoverer H/T Plus +6
    47
    Why this score
    SourceDiscoverer H/T PlusGrandtrek SJ6
    Reviews found online5347
Scores at a glance
CategoryCooper Discoverer H/T PlusDunlop Grandtrek SJ6
Relative Score 59 54
Dry 64 52
Wet 60 54
Snow 54 58
Comfort 63 53
Noise 65 59
Treadwear 51 54
Handling (owners) 53 47

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
± 8

Discoverer H/T Plus

± 8

Grandtrek SJ6

Pros, cons & observations

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

Tire A Discoverer H/T Plus

Pros

  • Smooth and quiet highway ride quality
  • Strong wet and dry traction, including dependable performance in rain
  • Attractive and somewhat aggressive tread design that enhances truck appearance

Cons

  • Rapid tread wear reported by some users, failing to meet expected mileage warranties
  • Slight decrease in fuel economy noted by a few drivers
  • Occasional minor increase in road noise compared to previous tires on specific setups
All owner themes in the Discoverer H/T Plus review

Tire B Grandtrek SJ6

Pros

  • Competitive and affordable pricing
  • Good performance in snow, wet, and dry conditions
  • Durable, meaty tread design suitable for rough roads

Cons

  • High level of road noise
  • Poor traction and grip on ice
  • Challenging handling and braking performance reported by some users
All owner themes in the Grandtrek SJ6 review

Specs side by side

Attribute A · Cooper Discoverer H/T Plus B · Dunlop Grandtrek SJ6
CategoryAll-Season tireWinter Premium Touring tires
Vehicle typeSUV and 4x4SUV and 4x4
Tread depth12/32″13/32″
UTQG460 A B—
SidewallBlackwallBlackwall
Max pressure50 psi44 psi

Which one should you actually buy?

Cooper Discoverer H/T Plus

Dunlop Grandtrek SJ6

Winner: Cooper Discoverer H/T Plus — better dry, comfort and wet. Pick the Dunlop Grandtrek SJ6 if snow and treadwear matter most to you. Dunlop Grandtrek SJ6 rests on little evidence so far (0 tests, 6 reviews), so read this result as provisional.

Pick tire A You want the most grip on dry roads

Cooper Discoverer H/T Plus scores 64 vs 52 on dry.

Pick tire A You want the most comfortable ride

Cooper Discoverer H/T Plus scores 63 vs 53 on comfort.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer H/T Plus scores 60 vs 54 on wet.

Pick tire A You want a quieter cabin

Cooper Discoverer H/T Plus scores 65 vs 59 on noise.

Tire A · Cooper Discoverer H/T Plus
Check price on Amazon
Tire B · Dunlop Grandtrek SJ6
Check price on Amazon

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

Discoverer H/T Plus or Grandtrek SJ6?

Which is better in the wet, Discoverer H/T Plus or Grandtrek SJ6?

Cooper Discoverer H/T Plus, 60 vs 54 on our wet score.

Which grips better on dry roads, Discoverer H/T Plus or Grandtrek SJ6?

Cooper Discoverer H/T Plus, 64 vs 52 on our dry score.

Which is better in snow, Discoverer H/T Plus or Grandtrek SJ6?

Dunlop Grandtrek SJ6, 58 vs 54 on our snow score.

Which is quieter, Discoverer H/T Plus or Grandtrek SJ6?

Cooper Discoverer H/T Plus, 65 vs 59 on our noise score.

Which is more comfortable, Discoverer H/T Plus or Grandtrek SJ6?

Cooper Discoverer H/T Plus, 63 vs 53 on our comfort score.

Which lasts longer, Discoverer H/T Plus or Grandtrek SJ6?

Dunlop Grandtrek SJ6, 54 vs 51 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