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Michelin Latitude Diamaris looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Bridgestone Ecopia H/L 422 Plus vs Michelin Latitude Diamaris — 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 41 + 5 owner reviews. How we score

Latitude Diamaris is ahead, 70–64

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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. 63

    Dry

    Latitude Diamaris +9
    72
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 65 (est.)≈ 70 (est.)
    Reviews found online6174

    Ecopia H/L 422 Plus: 60% × 64.9 (est.) + 40% × 60.6 = 63

    Latitude Diamaris: 60% × 70.5 (est.) + 40% × 73.7 = 72

    No road tests of dry for Ecopia H/L 422 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 Latitude Diamaris. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 68

    Wet

    Latitude Diamaris +2
    70
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 68 (est.)≈ 70 (est.)
    Reviews found online6770

    Ecopia H/L 422 Plus: 60% × 68.5 (est.) + 40% × 66.6 = 68

    Latitude Diamaris: 60% × 70.2 (est.) + 40% × 69.8 = 70

    No road tests of wet for Ecopia H/L 422 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 Latitude Diamaris. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 69

    Snow

    No comparison
    –
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 69 (est.)–
    Reviews found online67–

    Ecopia H/L 422 Plus: 60% × 69.4 (est.) + 40% × 67.2 = 69

    No road tests of snow for Ecopia H/L 422 Plus. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

  4. 62

    Comfort

    Latitude Diamaris +7
    69
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 67 (est.)≈ 69 (est.)
    Reviews found online5969

    Ecopia H/L 422 Plus: 40% × 67.3 (est.) + 60% × 59.2 = 62

    Latitude Diamaris: 40% × 69 (est.) + 60% × 68.6 = 69

    No road tests of comfort for Ecopia H/L 422 Plus or Latitude Diamaris. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 64

    Noise

    No comparison
    –
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 67 (est.)–
    Reviews found online60–

    Ecopia H/L 422 Plus: 60% × 66.6 (est.) + 40% × 59.9 = 64

    No road tests of noise for Ecopia H/L 422 Plus. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 61

    Treadwear

    Latitude Diamaris +7
    68
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Professional tests (TWG score)≈ 63 (est.)≈ 67 (est.)
    Reviews found online5869

    Ecopia H/L 422 Plus: 60% × 63.1 (est.) + 40% × 57.5 = 61

    Latitude Diamaris: 60% × 67.3 (est.) + 40% × 69.4 = 68

    No road tests of treadwear for Ecopia H/L 422 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 Latitude Diamaris. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  7. –

    Handling (owners)

    No comparison
    68
    Why this score
    SourceEcopia H/L 422 PlusLatitude Diamaris
    Reviews found online–68
Scores at a glance
CategoryBridgestone Ecopia H/L 422 PlusMichelin Latitude Diamaris
Relative Score 64 70
Dry 63 72
Wet 68 70
Snow 69 –
Comfort 62 69
Noise 64 –
Treadwear 61 68
Handling (owners) – 68

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

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

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
± 8

Ecopia H/L 422 Plus

± 8

Latitude Diamaris

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 Ecopia H/L 422 Plus

Not enough owner reviews yet to extract themes.

Tire B Latitude Diamaris

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

Cons

  • Inconsistent wet-weather performance and susceptibility to hydroplaning
  • Poor traction in snow and icy conditions
  • High initial purchase price
All owner themes in the Latitude Diamaris review

Specs side by side

Attribute A · Bridgestone Ecopia H/L 422 Plus B · Michelin Latitude Diamaris
CategoryAll-Season tireSummer
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available19—
Rim diameters15″ – 20″—
Tread depth9/32″—
UTQG600 A A—
SidewallBlackwall—
Max pressure51 psi—

Which one should you actually buy?

Bridgestone Ecopia H/L 422 Plus

Michelin Latitude Diamaris

Winner: Michelin Latitude Diamaris — better dry, comfort and treadwear. It leads or ties in every category we score. Michelin Latitude Diamaris rests on little evidence so far (0 tests, 5 reviews), so read this result as provisional.

Pick tire B You want the most grip on dry roads

Michelin Latitude Diamaris scores 72 vs 63 on dry.

Pick tire B You want the most comfortable ride

Michelin Latitude Diamaris scores 69 vs 62 on comfort.

Pick tire B You want the longest tread life

Michelin Latitude Diamaris scores 68 vs 61 on treadwear.

Tire A · Bridgestone Ecopia H/L 422 Plus
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Tire B · Michelin Latitude Diamaris
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Ecopia H/L 422 Plus or Latitude Diamaris?

Which is better in the wet, Ecopia H/L 422 Plus or Latitude Diamaris?

Neither, by our numbers: 68 vs 70 on the wet score, within 3 points.

Which grips better on dry roads, Ecopia H/L 422 Plus or Latitude Diamaris?

Michelin Latitude Diamaris, 72 vs 63 on our dry score.

Which is more comfortable, Ecopia H/L 422 Plus or Latitude Diamaris?

Michelin Latitude Diamaris, 69 vs 62 on our comfort score.

Which lasts longer, Ecopia H/L 422 Plus or Latitude Diamaris?

Michelin Latitude Diamaris, 68 vs 61 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