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Kumho Ecsta STX KL12 vs Michelin Defender LTX M/S — Compared

Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 0 + 1 road tests and 15 + 10 owner reviews. How we score

Defender LTX M/S is ahead, 76–61

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Kumho Ecsta STX KL12
Tire AKumho

Ecsta STX KL12

Summer High Performance tires

Provisional

Tests – · none yet Owners 57 · 15 reviews

Michelin Defender LTX M/S
Tire BMichelin

Defender LTX M/S

All Season

Provisional

Tests – · 1 test Owners 78 · 10 reviews

Best test result: #2 of 13 in 2022 Consumer Reports All Season Truck 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.

  1. 61

    Dry

    Defender LTX M/S +15
    76
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score)≈ 63 (est.)≈ 73 (est.)
    Reviews found online5781

    Ecsta STX KL12: 60% × 63.4 (est.) + 40% × 56.9 = 61

    Defender LTX M/S: 60% × 73.2 (est.) + 40% × 81.3 = 76

    No road tests of dry for Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

    No road tests of dry for Defender LTX M/S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 57

    Wet

    Defender LTX M/S +21
    78
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score)≈ 60 (est.)≈ 76 (est.)
    Reviews found online5281

    Ecsta STX KL12: 60% × 60.1 (est.) + 40% × 52.4 = 57

    Defender LTX M/S: 60% × 75.9 (est.) + 40% × 80.7 = 78

    No road tests of wet for Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

    No road tests of wet for Defender LTX M/S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 63

    Snow

    Defender LTX M/S +9
    72
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score)≈ 66 (est.)≈ 71 (est.)
    Reviews found online5873

    Ecsta STX KL12: 60% × 66 (est.) + 40% × 58.2 = 63

    Defender LTX M/S: 60% × 71 (est.) + 40% × 73.2 = 72

    No road tests of snow for Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

    No road tests of snow for Defender LTX M/S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

  4. 65

    Comfort

    Defender LTX M/S +8
    73
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score)≈ 68 (est.)≈ 70 (est.)
    Reviews found online6176

    Ecsta STX KL12: 60% × 67.8 (est.) + 40% × 61.4 = 65

    Defender LTX M/S: 60% × 70.3 (est.) + 40% × 76.1 = 73

    No road tests of comfort for Ecsta STX KL12 or Defender LTX M/S. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 67

    Noise

    Defender LTX M/S +3
    70
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score)≈ 67 (est.)≈ 67 (est.)
    Reviews found online6775

    Ecsta STX KL12: 60% × 67.3 (est.) + 40% × 66.8 = 67

    Defender LTX M/S: 60% × 67.3 (est.) + 40% × 74.7 = 70

    No road tests of noise for Ecsta STX KL12 or Defender LTX M/S. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 61

    Treadwear

    Defender LTX M/S +15
    76
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Professional tests (TWG score) · – / 1 tests≈ 63 (est.)74
    Reviews found online5878

    Ecsta STX KL12: 60% × 63.3 (est.) + 40% × 58.1 = 61

    Defender LTX M/S: 60% × 74.3 + 40% × 78 = 76

    No road tests of treadwear for Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

  7. 54

    Handling (owners)

    Defender LTX M/S +25
    79
    Why this score
    SourceEcsta STX KL12Defender LTX M/S
    Reviews found online5479
Scores at a glance
CategoryKumho Ecsta STX KL12Michelin Defender LTX M/S
Relative Score 61 76
Dry 61 76
Wet 57 78
Snow 63 72
Comfort 65 73
Noise 67 70
Treadwear 61 76
Handling (owners) 54 79

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
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Neutral
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Less important
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Neutral
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Recomputed
Headline score

Ecsta STX KL12

Defender LTX M/S

Pros, cons & observations

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

Tire A Ecsta STX KL12

Pros

  • Excellent price-to-performance ratio
  • High tread life and durability
  • Strong wet weather grip and cornering stability

Cons

  • Potential for increased road noise over time
  • Inconsistent traction performance on certain vehicle chassis
  • Accelerated wear on poor road surfaces
All owner themes in the Ecsta STX KL12 review

Tire B Defender LTX M/S

Pros

  • Exceptional tread longevity and mileage lifespan
  • Quiet and smooth ride quality at highway speeds
  • Strong year-round traction across dry, wet, and light snow conditions

Cons

  • High upfront purchase price
  • Subpar performance in deep mud, sand, and off-road environments
  • Limited ice and severe winter capability compared to dedicated winter tires
All owner themes in the Defender LTX M/S review

Specs side by side

Attribute A · Kumho Ecsta STX KL12 B · Michelin Defender LTX M/S
CategorySummer High Performance tiresAll Season
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available7—
Rim diameters18″ – 22″—
Tread depth11.5/32″—
UTQG420 A A—
SidewallBlackwall—
Max pressure50 psi—

Which one should you actually buy?

Kumho Ecsta STX KL12

Michelin Defender LTX M/S

Winner: Michelin Defender LTX M/S — better handling, wet and dry. It leads or ties in every category we score. Kumho Ecsta STX KL12 rests on little evidence so far (0 tests, 15 reviews), so read this result as provisional. Michelin Defender LTX M/S rests on little evidence so far (1 test, 10 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Michelin Defender LTX M/S scores 79 vs 54 on handling.

Pick tire B Your priority is wet-weather safety

Michelin Defender LTX M/S scores 78 vs 57 on wet.

Pick tire B You want the most grip on dry roads

Michelin Defender LTX M/S scores 76 vs 61 on dry.

Pick tire B You want the longest tread life

Michelin Defender LTX M/S scores 76 vs 61 on treadwear.

Tire A · Kumho Ecsta STX KL12
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Tire B · Michelin Defender LTX M/S
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Ecsta STX KL12 or Defender LTX M/S?

Which is better in the wet, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 78 vs 57 on our wet score.

Which grips better on dry roads, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 76 vs 61 on our dry score.

Which is better in snow, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 72 vs 63 on our snow score.

Which is quieter, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 70 vs 67 on our noise score.

Which is more comfortable, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 73 vs 65 on our comfort score.

Which lasts longer, Ecsta STX KL12 or Defender LTX M/S?

Michelin Defender LTX M/S, 76 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