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Head-to-head Updated

Bridgestone Ecopia EP150 vs Sumitomo HTR Z III — Compared

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

HTR Z III is ahead, 62–57

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Tire ABridgestone

Ecopia EP150

Summer

Tests – · none yet Owners 52 · 75 reviews

Best test result: #2 of 14 in 2011 European Summer Tyre Test - 195/65 R15 (overall ranking)

Tire BSumitomo

HTR Z III

Summer

Tests – · 1 test Owners 58 · 42 reviews

Best test result: #17 of 22 in 2022 Consumer Reports Ultra High Performance Summer Tires (overall ranking)

Category by category

Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.

  1. 57

    Dry

    HTR Z III +11
    68
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online5168
  2. 61

    Wet

    HTR Z III +3
    64
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online5862
  3. 50

    Snow

    Ecopia EP150 +13
    37
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online3615
  4. 61

    Comfort

    HTR Z III +6
    67
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online5466
  5. 61

    Noise

    HTR Z III +4
    65
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online5464
  6. 58

    Treadwear

    HTR Z III +8
    66
    Why this score
    SourceEcopia EP150HTR Z III
    Professional tests (TWG score)–70
    Reviews found online5260
  7. 55

    Handling

    HTR Z III +11
    66
    Why this score
    SourceEcopia EP150HTR Z III
    Reviews found online5566
Scores at a glance
CategoryBridgestone Ecopia EP150Sumitomo HTR Z III
Relative Score 57 62
Dry 57 68
Wet 61 64
Snow 50 37
Comfort 61 67
Noise 61 65
Treadwear 58 66
Handling 55 66

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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Recomputed
Headline score

Ecopia EP150

HTR Z III

The professional test results behind the scores

Each result is shown as % of the best tire in that test. “Same test” rows are the strictest comparison: both tires were measured side by side.

DisciplineCategoryEcopia EP150HTR Z IIIΔBoth?
Overall Ranking Overall 50% #2/14 · 2011 European Summer Tyre Test - 195/65 R15 24% #17/22 · 2022 Consumer Reports Ultra High Performance Summer Tires +26.2 Different tests

Pros, cons & observations

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

Tire A Ecopia EP150

Pros

  • High level of ride comfort and low-speed smoothness
  • Generally durable construction capable of handling potholes
  • Satisfactory dry-road handling for casual, daily driving

Cons

  • Frequently cited as dangerous or unpredictable in wet conditions
  • Noticeable increase in road noise as the tire ages
  • Inconsistent tread wear, with some users reporting premature failure
All owner themes in the Ecopia EP150 review

Tire B HTR Z III

Pros

  • Excellent price-to-performance ratio
  • Strong dry handling and steering feedback
  • Quiet and comfortable ride quality

Cons

  • Inconsistent wet-weather side grip during cornering
  • Limited traction under heavy acceleration on high-horsepower vehicles
  • Not suitable for winter or freezing conditions
All owner themes in the HTR Z III review

Specs side by side

Attribute A · Bridgestone Ecopia EP150 B · Sumitomo HTR Z III
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available241
Rim diameters13″ – 17″19″
Tread depth—10/32″
UTQG200 B B300 A A
SidewallBlackwallBlackwall
Max pressure—50 psi

Which one should you actually buy?

Bridgestone Ecopia EP150

Sumitomo HTR Z III

Winner: Sumitomo HTR Z III — better dry, handling and treadwear. Pick the Bridgestone Ecopia EP150 if snow matters most to you.

Pick tire A You drive through snowy winters

Bridgestone Ecopia EP150 scores 50 vs 37 on snow.

Pick tire B You want the most grip on dry roads

Sumitomo HTR Z III scores 68 vs 57 on dry.

Pick tire B You enjoy sharp, responsive handling

Sumitomo HTR Z III scores 66 vs 55 on handling.

Pick tire B You want the longest tread life

Sumitomo HTR Z III scores 66 vs 58 on treadwear.

Tire A · Bridgestone Ecopia EP150
Check price on Amazon
Tire B · Sumitomo HTR Z III
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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.

62

Leads

HTR Z III

Amazon