Tests – · none yet Owners 39 · 27 reviews
Head-to-head
Updated
Dunlop Grandtrek ST30 vs Michelin Defender T+H — 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 + 1 road tests and 27 + 1 owner reviews. How we score
Defender T+H is ahead, 70–50
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.
Tests – · 1 test Owners 69 · 1 review
Best test result: #1 of 8 in 2022 Consumer Reports All-Season Tires (tested tread life (miles))
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
49
Dry
Defender T+H +2069Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) ≈ 56 (est.) ≈ 69 (est.) Reviews found online 39 70 Grandtrek ST30: 60% × 55.8 (est.) + 40% × 38.5 = 49
Defender T+H: 60% × 68.8 (est.) + 40% × 70 = 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 Defender T+H. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
-
51
Wet
Defender T+H +2172Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) ≈ 56 (est.) ≈ 72 (est.) Reviews found online 44 73 Grandtrek ST30: 60% × 55.9 (est.) + 40% × 43.5 = 51
Defender T+H: 60% × 71.9 (est.) + 40% × 72.8 = 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 Defender T+H. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
-
54
Snow
Defender T+H +1165Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) ≈ 62 (est.) ≈ 68 (est.) Reviews found online 43 61 Grandtrek ST30: 60% × 61.7 (est.) + 40% × 42.9 = 54
Defender T+H: 60% × 67.5 (est.) + 40% × 61.1 = 65
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).
No road tests of snow for Defender T+H. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
-
46
Comfort
Defender T+H +2167Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) ≈ 62 (est.) ≈ 68 (est.) Reviews found online 35 66 Grandtrek ST30: 40% × 61.8 (est.) + 60% × 34.7 = 46
Defender T+H: 40% × 68.1 (est.) + 60% × 66 = 67
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 Defender T+H. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
-
52
Noise
No comparison–Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) ≈ 66 (est.) – Reviews found online 29 – 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.
-
47
Treadwear
Defender T+H +2673Why this score
Source Grandtrek ST30 Defender T+H Professional tests (TWG score) · – / 1 tests ≈ 55 (est.) 76 Reviews found online 35 68 Grandtrek ST30: 60% × 54.9 (est.) + 40% × 34.5 = 47
Defender T+H: 60% × 76.1 + 40% × 67.9 = 73
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).
-
42
Handling (owners)
No comparison–Why this score
Source Grandtrek ST30 Defender T+H Reviews found online 42 –
Scores at a glance
| Category | Dunlop Grandtrek ST30 | Michelin Defender T+H |
|---|---|---|
| Relative Score | 50 | 70 |
| Dry | 49 | 69 |
| Wet | 51 | 72 |
| Snow | 54 | 65 |
| Comfort | 46 | 67 |
| Noise | 52 | – |
| Treadwear | 47 | 73 |
| Handling (owners) | 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
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
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Recomputed
Headline score
50
/ 100
Grandtrek ST30
70
/ 100
Defender T+H
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
Tire B Defender T+H
Not enough owner reviews yet to extract themes.
Specs side by side
| Attribute | A · Dunlop Grandtrek ST30 | B · Michelin Defender T+H |
|---|---|---|
| Category | All Season | Premium Touring All Season tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 5 | — |
| Rim diameters | 17″ – 19″ | — |
| Tread depth | 10/32″ | — |
| UTQG | 360 A A | 820 A - B B |
| Sidewall | Blackwall | — |
| Max pressure | 51 psi | — |
Which one should you actually buy?
50
/ 100
Dunlop Grandtrek ST30
70
/ 100
Michelin Defender T+H
Winner: Michelin Defender T+H — better treadwear, wet and comfort. It leads or ties in every category we score. Michelin Defender T+H rests on little evidence so far (1 test, 1 review), so read this result as provisional.
Pick tire B
You want the longest tread life
Michelin Defender T+H scores 73 vs 47 on treadwear.
Pick tire B
Your priority is wet-weather safety
Michelin Defender T+H scores 72 vs 51 on wet.
Pick tire B
You want the most comfortable ride
Michelin Defender T+H scores 67 vs 46 on comfort.
Pick tire B
You want the most grip on dry roads
Michelin Defender T+H scores 69 vs 49 on dry.
Tire A · Dunlop Grandtrek ST30
Tire B · Michelin Defender T+H
TireWheelGuide may earn a commission from purchases made through these links.
Grandtrek ST30 or Defender T+H?
Which is better in the wet, Grandtrek ST30 or Defender T+H?
Michelin Defender T+H, 72 vs 51 on our wet score.
Which grips better on dry roads, Grandtrek ST30 or Defender T+H?
Michelin Defender T+H, 69 vs 49 on our dry score.
Which is better in snow, Grandtrek ST30 or Defender T+H?
Michelin Defender T+H, 65 vs 54 on our snow score.
Which is more comfortable, Grandtrek ST30 or Defender T+H?
Michelin Defender T+H, 67 vs 46 on our comfort score.
Which lasts longer, Grandtrek ST30 or Defender T+H?
Michelin Defender T+H, 73 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