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Bridgestone Ecopia EP422 looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head

Bridgestone Ecopia EP422 vs Pirelli P Zero Nero All Season Run Flat — Compared

Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 0 + 0 road tests and 15 + 37 owner reviews. How we score

P Zero Nero All Season Run Flat is ahead, 60–55

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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. 52

    Dry

    P Zero Nero All Season Run Flat +12
    64
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 58 (est.)≈ 66 (est.)
    Reviews found online4463

    Ecopia EP422: 60% × 58 (est.) + 40% × 43.6 = 52

    P Zero Nero All Season Run Flat: 60% × 65.7 (est.) + 40% × 62.6 = 64

    No road tests of dry for Ecopia EP422. 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 P Zero Nero All Season Run Flat. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 56

    Wet

    P Zero Nero All Season Run Flat +8
    64
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 59 (est.)≈ 65 (est.)
    Reviews found online5162

    Ecopia EP422: 60% × 59.2 (est.) + 40% × 50.8 = 56

    P Zero Nero All Season Run Flat: 60% × 65.2 (est.) + 40% × 61.5 = 64

    No road tests of wet for Ecopia EP422. 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 P Zero Nero All Season Run Flat. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 55

    Snow

    P Zero Nero All Season Run Flat +5
    60
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 62 (est.)≈ 65 (est.)
    Reviews found online4654

    Ecopia EP422: 60% × 61.9 (est.) + 40% × 45.8 = 55

    P Zero Nero All Season Run Flat: 60% × 64.6 (est.) + 40% × 53.8 = 60

    No road tests of snow for Ecopia EP422. 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 P Zero Nero All Season Run Flat. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

  4. 56

    Comfort

    Ecopia EP422 +2
    54
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 65 (est.)≈ 64 (est.)
    Reviews found online4439

    Ecopia EP422: 60% × 64.7 (est.) + 40% × 43.7 = 56

    P Zero Nero All Season Run Flat: 60% × 63.8 (est.) + 40% × 38.5 = 54

    No road tests of comfort for Ecopia EP422 or P Zero Nero All Season Run Flat. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 62

    Noise

    Ecopia EP422 +5
    57
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 67 (est.)≈ 67 (est.)
    Reviews found online5542

    Ecopia EP422: 60% × 67.3 (est.) + 40% × 55 = 62

    P Zero Nero All Season Run Flat: 60% × 67.3 (est.) + 40% × 41.7 = 57

    No road tests of noise for Ecopia EP422 or P Zero Nero All Season Run Flat. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 58

    Treadwear

    Ecopia EP422 +2
    56
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Professional tests (TWG score)≈ 61 (est.)≈ 61 (est.)
    Reviews found online5250

    Ecopia EP422: 60% × 61.4 (est.) + 40% × 51.8 = 58

    P Zero Nero All Season Run Flat: 60% × 60.8 (est.) + 40% × 49.9 = 56

    No road tests of treadwear for Ecopia EP422. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

    No road tests of treadwear for P Zero Nero All Season Run Flat. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

  7. 43

    Handling (owners)

    P Zero Nero All Season Run Flat +4
    47
    Why this score
    SourceEcopia EP422P Zero Nero All Season Run Flat
    Reviews found online4347
Scores at a glance
CategoryBridgestone Ecopia EP422Pirelli P Zero Nero All Season Run Flat
Relative Score 55 60
Dry 52 64
Wet 56 64
Snow 55 60
Comfort 56 54
Noise 62 57
Treadwear 58 56
Handling (owners) 43 47

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
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Neutral
NotLessNeutralImportantMost
Less important
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Recomputed
Headline score

Ecopia EP422

P Zero Nero All Season Run Flat

Specs side by side

Attribute A · Bridgestone Ecopia EP422 B · Pirelli P Zero Nero All Season Run Flat
CategoryAll-Season tireAll-Season tire
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available6—
Rim diameters15″ – 17″—
Tread depth10/32″—
UTQG480 A A—
Treadwear warranty65,000 mi—
SidewallBlackwall—
Max pressure51 psi—

Which one should you actually buy?

Bridgestone Ecopia EP422

Pirelli P Zero Nero All Season Run Flat

Winner: Pirelli P Zero Nero All Season Run Flat — better dry, wet and snow. Pick the Bridgestone Ecopia EP422 if noise matters most to you. Bridgestone Ecopia EP422 rests on little evidence so far (0 tests, 15 reviews), so read this result as provisional.

Pick tire B You want the most grip on dry roads

Pirelli P Zero Nero All Season Run Flat scores 64 vs 52 on dry.

Pick tire B Your priority is wet-weather safety

Pirelli P Zero Nero All Season Run Flat scores 64 vs 56 on wet.

Pick tire A You want a quieter cabin

Bridgestone Ecopia EP422 scores 62 vs 57 on noise.

Pick tire B You drive through snowy winters

Pirelli P Zero Nero All Season Run Flat scores 60 vs 55 on snow.

Tire A · Bridgestone Ecopia EP422
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Tire B · Pirelli P Zero Nero All Season Run Flat
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Ecopia EP422 or P Zero Nero All Season Run Flat?

Which is better in the wet, Ecopia EP422 or P Zero Nero All Season Run Flat?

Pirelli P Zero Nero All Season Run Flat, 64 vs 56 on our wet score.

Which grips better on dry roads, Ecopia EP422 or P Zero Nero All Season Run Flat?

Pirelli P Zero Nero All Season Run Flat, 64 vs 52 on our dry score.

Which is better in snow, Ecopia EP422 or P Zero Nero All Season Run Flat?

Pirelli P Zero Nero All Season Run Flat, 60 vs 55 on our snow score.

Which is quieter, Ecopia EP422 or P Zero Nero All Season Run Flat?

Bridgestone Ecopia EP422, 62 vs 57 on our noise score.

Which is more comfortable, Ecopia EP422 or P Zero Nero All Season Run Flat?

Neither, by our numbers: 56 vs 54 on the comfort score, within 3 points.

Which lasts longer, Ecopia EP422 or P Zero Nero All Season Run Flat?

Neither, by our numbers: 58 vs 56 on the treadwear score, within 3 points.

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