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Head-to-head Updated May 2026

Michelin Latitude Diamaris vs Toyo Open Country A20 — Compared (May 2026)

Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.

Tire A Michelin

Michelin Latitude Diamaris

Summer Ultra High Performance tires

Michelin Latitude Diamaris tread pattern
Objective (60%)
–/100
No test data yet
User signal (40%)
78/100
5 owner reviews
Dry
95
Wet
75
Snow
–
Comfort
85
Noise
–
Treadwear
85
Handling
77
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Prices change daily — check the retailer for your size.

VS
Tire B Toyo

Toyo Open Country A20

Toyo Open Country A20 tread pattern
Objective (60%)
–/100
No test data yet
User signal (40%)
22/100
Owner ratings
Dry
71
Wet
58
Snow
42
Comfort
72
Noise
71
Treadwear
47
Handling
70
Check price on Amazon

Prices change daily — check the retailer for your size.

VerdictWinner: Michelin Latitude Diamaris — better treadwear, dry and wet. It leads or ties in every category we score.
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Category breakdown

7 categories, side by side

Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.

Dry

Weight: Neutral
Score (0–100) Latitude Diamaris leads by 24
A
95
B
71
Why this score
SourceLatitude DiamarisOpen Country A20
Tire Rack owners – 73
Tyre Reviews owners 95 –

Wet

Weight: Important
Score (0–100) Latitude Diamaris leads by 17
A
75
B
58
Why this score
SourceLatitude DiamarisOpen Country A20
Tire Rack owners – 60
Tyre Reviews owners 75 –

Snow

Weight: Neutral
Score (0–100)
A
–
B
42
Why this score
SourceLatitude DiamarisOpen Country A20
Tire Rack owners – 44

Comfort

Weight: Neutral
Score (0–100) Latitude Diamaris leads by 13
A
85
B
72
Why this score
SourceLatitude DiamarisOpen Country A20
Tire Rack owners – 73
Tyre Reviews owners 85 –

Noise

Weight: Neutral
Score (0–100)
A
–
B
71

Treadwear

Weight: Important
Score (0–100) Latitude Diamaris leads by 38
A
85
B
47
Why this score
SourceLatitude DiamarisOpen Country A20
Tire Rack owners – 52
Tyre Reviews owners 85 –

Handling

Weight: Neutral
Score (0–100) Latitude Diamaris leads by 7
A
77
B
70
Why this score
SourceLatitude DiamarisOpen Country A20
Tyre Reviews owners 77 –

Scores at a glance

CategoryMichelin Latitude DiamarisToyo Open Country A20
Relative Score 83 61
Dry 95 71
Wet 75 58
Snow – 42
Comfort 85 72
Noise – 71
Treadwear 85 47
Handling 77 70

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

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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.

Neutral
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Important
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Neutral
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Neutral
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Neutral
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Important
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Recomputed
Headline score

Tire A

Tire B

Only categories both tires have data for count toward the headline score.

From owners

Pros, cons & observations

Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.

Tire A Michelin Latitude Diamaris

The Michelin Latitude Diamaris is widely regarded for its exceptional tread longevity and fuel efficiency, particularly when fitted to luxury SUVs like the BMW X5. While users praise its dry-weather performance and quiet ride, opinions on wet-weather traction are polarized, with some drivers reporting concerns regarding hydroplaning in standing water.

Pros

  • Exceptional tread life with many users reporting 40,000+ miles
  • High fuel efficiency compared to newer successor models
  • Strong dry-weather grip and handling feedback
  • Quiet and comfortable ride quality

Cons

  • Inconsistent wet-weather performance and susceptibility to hydroplaning
  • Poor traction in snow and icy conditions
  • High initial purchase price
  • Traction control intervention reported in standing water

Observations

  • BMW X5 owners consistently report high mileage figures, often exceeding 40,000 miles per set.
  • Users suggest that the wide tire profiles (e.g., 275mm) may contribute to increased hydroplaning risks in deep standing water.
Tire B Toyo Open Country A20

Not enough owner reviews yet to extract themes.

Specifications

Specs side by side

Attribute A · Michelin Latitude Diamaris B · Toyo Open Country A20
CategorySummer Ultra High Performance tires—
Vehicle typeSUV and 4x4—
Final verdict

Which one should you actually buy?

Michelin

Toyo

Winner: Michelin Latitude Diamaris — better treadwear, dry and wet. It leads or ties in every category we score.

Pick tire A You want the longest tread life

Michelin Latitude Diamaris scores 85 vs 47 on treadwear.

Pick tire A You want the most grip on dry roads

Michelin Latitude Diamaris scores 95 vs 71 on dry.

Pick tire A Your priority is wet-weather safety

Michelin Latitude Diamaris scores 75 vs 58 on wet.

Pick tire A You want the most comfortable ride

Michelin Latitude Diamaris scores 85 vs 72 on comfort.

Tire A · Michelin Latitude Diamaris
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Tire B · Toyo Open Country A20
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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) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.

Community buzz from Reddit and forums is shown for context only — it never changes the score.