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Head-to-head Updated

Kumho Ecsta PS31 vs Michelin Primacy 4+ — Compared

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

Primacy 4+ is ahead, 77–66

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Tire AKumho

Ecsta PS31

Summer

Tests – · none yet Owners 64 · 259 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

    Primacy 4+ +14
    78
    Why this score
    SourceEcsta PS31Primacy 4+
    Professional tests (TWG score)–82
    Reviews found online6372
  2. 69

    Wet

    Primacy 4+ +10
    79
    Why this score
    SourceEcsta PS31Primacy 4+
    Professional tests (TWG score)–82
    Reviews found online6876
  3. 58

    Snow

    No comparison
    –
    Why this score
    SourceEcsta PS31Primacy 4+
    Reviews found online50–
  4. 67

    Comfort

    Primacy 4+ +6
    73
    Why this score
    SourceEcsta PS31Primacy 4+
    Professional tests (TWG score)–73
    Reviews found online6572
  5. 67

    Noise

    Primacy 4+ +5
    72
    Why this score
    SourceEcsta PS31Primacy 4+
    Professional tests (TWG score)–75
    Reviews found online66–
  6. 65

    Treadwear

    Primacy 4+ +17
    82
    Why this score
    SourceEcsta PS31Primacy 4+
    Professional tests (TWG score)–90
    Reviews found online6570
  7. 67

    Handling

    Primacy 4+ +1
    68
    Why this score
    SourceEcsta PS31Primacy 4+
    Reviews found online6768
Scores at a glance
CategoryKumho Ecsta PS31Michelin Primacy 4+
Relative Score 66 77
Dry 64 78
Wet 69 79
Snow 58 –
Comfort 67 73
Noise 67 72
Treadwear 65 82
Handling 67 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 and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.

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

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Recomputed
Headline score

Ecsta PS31

Primacy 4+

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 Ecsta PS31

Pros

  • Excellent price-to-performance ratio
  • High levels of ride comfort and low road noise
  • Strong dry traction for daily and spirited street driving

Cons

  • Soft sidewalls lead to vague steering response and 'squirm' during aggressive maneuvers
  • Inconsistent wet weather performance reported by some users, particularly in deep standing water
  • Tread life can be shorter than expected for some driving styles
All owner themes in the Ecsta PS31 review

Tire B Primacy 4+

Pros

  • Excellent ride comfort and a smooth, compliant 'limousine-like' feel over bumps
  • Strong and reliable grip in both wet and dry conditions, inspiring confidence
  • Noticeable improvement in quietness and traction compared to predecessor tires or factory options

Cons

  • Loud road noise and a harsh drone on rough or coarse asphalt surfaces
  • Soft sidewalls can reduce steering agility and initial responsiveness compared to dedicated sport tires
  • High premium price point relative to competitors
All owner themes in the Primacy 4+ review

Specs side by side

Attribute A · Kumho Ecsta PS31 B · Michelin Primacy 4+
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available2166
Rim diameters15″ – 18″16″ – 21″
Tread depth10/32″—
UTQG460 A A—
SidewallBlackwall—
Max pressure51 psi—

Which one should you actually buy?

Kumho Ecsta PS31

Michelin Primacy 4+

Winner: Michelin Primacy 4+ — better treadwear, dry and wet. It leads or ties in every category we score.

Pick tire B You want the longest tread life

Michelin Primacy 4+ scores 82 vs 65 on treadwear.

Pick tire B You want the most grip on dry roads

Michelin Primacy 4+ scores 78 vs 64 on dry.

Pick tire B Your priority is wet-weather safety

Michelin Primacy 4+ scores 79 vs 69 on wet.

Pick tire B You want the most comfortable ride

Michelin Primacy 4+ scores 73 vs 67 on comfort.

Tire A · Kumho Ecsta PS31
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Tire B · Michelin Primacy 4+
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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), 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.

77

Leads

Primacy 4+

Amazon