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Cooper Discoverer H/T Plus vs Kumho Ecsta STX KL12 — 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 34 + 15 owner reviews. How we score

Ecsta STX KL12 leads, 63–59 Narrow edge

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Kumho Ecsta STX KL12
Tire BKumho

Ecsta STX KL12

Summer High Performance tires

± 8Provisional

Tests – · none yet Owners 60 · 15 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

    Level
    64
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 65 (est.)≈ 65 (est.)
    Reviews found online6262

    Discoverer H/T Plus: 60% × 65.3 (est.) + 40% × 61.6 = 64

    Ecsta STX KL12: 60% × 65.4 (est.) + 40% × 61.8 = 64

    No road tests of dry for Discoverer H/T Plus. 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 Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 60

    Wet

    Ecsta STX KL12 +1
    61
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 63 (est.)≈ 63 (est.)
    Reviews found online5657

    Discoverer H/T Plus: 60% × 62.7 (est.) + 40% × 56.1 = 60

    Ecsta STX KL12: 60% × 63.4 (est.) + 40% × 57.4 = 61

    No road tests of wet for Discoverer H/T 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 Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 54

    Snow

    Ecsta STX KL12 +10
    64
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 62 (est.)≈ 67 (est.)
    Reviews found online4359

    Discoverer H/T Plus: 60% × 61.7 (est.) + 40% × 42.9 = 54

    Ecsta STX KL12: 60% × 66.9 (est.) + 40% × 59.1 = 64

    No road tests of snow for Discoverer H/T Plus. 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 Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 62

    Comfort

    Ecsta STX KL12 +1
    63
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 67 (est.)≈ 67 (est.)
    Reviews found online5961

    Discoverer H/T Plus: 40% × 66.7 (est.) + 60% × 58.7 = 62

    Ecsta STX KL12: 40% × 67 (est.) + 60% × 60.6 = 63

    No road tests of comfort for Discoverer H/T Plus. 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 Ecsta STX KL12. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 64

    Noise

    Ecsta STX KL12 +3
    67
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online6167

    Discoverer H/T Plus: 60% × 66.4 (est.) + 40% × 61.4 = 64

    Ecsta STX KL12: 60% × 66.4 (est.) + 40% × 67.1 = 67

    No road tests of noise for Discoverer H/T Plus or Ecsta STX KL12. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 51

    Treadwear

    Ecsta STX KL12 +11
    62
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Professional tests (TWG score)≈ 57 (est.)≈ 64 (est.)
    Reviews found online4159

    Discoverer H/T Plus: 60% × 57.3 (est.) + 40% × 41 = 51

    Ecsta STX KL12: 60% × 63.7 (est.) + 40% × 58.7 = 62

    No road tests of treadwear for Discoverer H/T Plus. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

    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 0.36).

  7. 53

    Handling (owners)

    Ecsta STX KL12 +4
    57
    Why this score
    SourceDiscoverer H/T PlusEcsta STX KL12
    Reviews found online5357
Scores at a glance
CategoryCooper Discoverer H/T PlusKumho Ecsta STX KL12
Relative Score 59 63
Dry 64 64
Wet 60 61
Snow 54 64
Comfort 62 63
Noise 64 67
Treadwear 51 62
Handling (owners) 53 57

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
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
± 8

Discoverer H/T Plus

± 8

Ecsta STX KL12

Pros, cons & observations

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

Tire A Discoverer H/T Plus

Pros

  • Smooth and quiet highway ride quality
  • Strong wet and dry traction, including dependable performance in rain
  • Attractive and somewhat aggressive tread design that enhances truck appearance

Cons

  • Rapid tread wear reported by some users, failing to meet expected mileage warranties
  • Slight decrease in fuel economy noted by a few drivers
  • Occasional minor increase in road noise compared to previous tires on specific setups
All owner themes in the Discoverer H/T Plus review

Tire B 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

Specs side by side

Attribute A · Cooper Discoverer H/T Plus B · Kumho Ecsta STX KL12
CategoryAll-Season tireSummer High Performance tires
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available27
Rim diameters18″ – 20″18″ – 22″
Tread depth12/32″11.5/32″
UTQG460 A B420 A A
SidewallBlackwallBlackwall
Max pressure50 psi50 psi

Which one should you actually buy?

Cooper Discoverer H/T Plus

Kumho Ecsta STX KL12

Narrow edge: Kumho Ecsta STX KL12 — better treadwear, snow and noise. 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.

Pick tire B You want the longest tread life

Kumho Ecsta STX KL12 scores 62 vs 51 on treadwear.

Pick tire B You drive through snowy winters

Kumho Ecsta STX KL12 scores 64 vs 54 on snow.

Pick tire B You want a quieter cabin

Kumho Ecsta STX KL12 scores 67 vs 64 on noise.

Tire A · Cooper Discoverer H/T Plus
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Tire B · Kumho Ecsta STX KL12
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Discoverer H/T Plus or Ecsta STX KL12?

Which is better in the wet, Discoverer H/T Plus or Ecsta STX KL12?

Neither, by our numbers: 60 vs 61 on the wet score, within 3 points.

Which grips better on dry roads, Discoverer H/T Plus or Ecsta STX KL12?

Neither, by our numbers: 64 vs 64 on the dry score, within 3 points.

Which is better in snow, Discoverer H/T Plus or Ecsta STX KL12?

Kumho Ecsta STX KL12, 64 vs 54 on our snow score.

Which is quieter, Discoverer H/T Plus or Ecsta STX KL12?

Kumho Ecsta STX KL12, 67 vs 64 on our noise score.

Which is more comfortable, Discoverer H/T Plus or Ecsta STX KL12?

Neither, by our numbers: 62 vs 63 on the comfort score, within 3 points.

Which lasts longer, Discoverer H/T Plus or Ecsta STX KL12?

Kumho Ecsta STX KL12, 62 vs 51 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