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Toyo NanoEnergy R38 looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Falken ZIEX ZE914 EcoRun vs Toyo NanoEnergy R38 — Compared

Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 1 + 0 road tests and 630 + 8 owner reviews. How we score

NanoEnergy R38 leads, 70–68 Narrow edge

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Falken ZIEX ZE914 EcoRun
Tire AFalken

ZIEX ZE914 EcoRun

Summer

Tests 71 · 1 test Owners 63 · 630 reviews

Best test result: #2 of 20 in 2020 Auto Zeitung Summer Tyre Test (straight aquaplaning)

Toyo NanoEnergy R38
Tire BToyo

NanoEnergy R38

Summer

Provisional

Tests – · none yet Owners 70 · 8 reviews

Category by category

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

  1. 67

    Dry

    NanoEnergy R38 +4
    71
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score) · 1 / – tests68≈ 70 (est.)
    Reviews found online6672

    ZIEX ZE914 EcoRun: 60% × 67.5 + 40% × 65.9 = 67

    NanoEnergy R38: 60% × 69.5 (est.) + 40% × 72.2 = 71

    No road tests of dry for NanoEnergy R38. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 73

    Wet

    ZIEX ZE914 EcoRun +1
    72
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score) · 1 / – tests76≈ 72 (est.)
    Reviews found online6773

    ZIEX ZE914 EcoRun: 60% × 76.1 + 40% × 67.2 = 73

    NanoEnergy R38: 60% × 71.7 (est.) + 40% × 73.2 = 72

    No road tests of wet for NanoEnergy R38. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 56

    Snow

    No comparison
    –
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score)≈ 62 (est.)–
    Reviews found online47–

    ZIEX ZE914 EcoRun: 60% × 62.2 (est.) + 40% × 46.6 = 56

    No road tests of snow for ZIEX ZE914 EcoRun. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

  4. 68

    Comfort

    NanoEnergy R38 +1
    69
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score) · 1 / – tests73≈ 69 (est.)
    Reviews found online6269

    ZIEX ZE914 EcoRun: 60% × 72.5 + 40% × 61.8 = 68

    NanoEnergy R38: 60% × 69.1 (est.) + 40% × 69.1 = 69

    No road tests of comfort for NanoEnergy R38. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 63

    Noise

    No comparison
    –
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score) · 1 / – tests64–
    Reviews found online61–

    ZIEX ZE914 EcoRun: 60% × 64 + 40% × 60.6 = 63

  6. 64

    Treadwear

    NanoEnergy R38 +1
    65
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Professional tests (TWG score)≈ 65 (est.)≈ 65 (est.)
    Reviews found online6365

    ZIEX ZE914 EcoRun: 60% × 64.8 (est.) + 40% × 63.1 = 64

    NanoEnergy R38: 60% × 65.3 (est.) + 40% × 64.6 = 65

    No road tests of treadwear for ZIEX ZE914 EcoRun. 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 NanoEnergy R38. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

  7. 67

    Handling (owners)

    NanoEnergy R38 +4
    71
    Why this score
    SourceZIEX ZE914 EcoRunNanoEnergy R38
    Reviews found online6771
Scores at a glance
CategoryFalken ZIEX ZE914 EcoRunToyo NanoEnergy R38
Relative Score 68 70
Dry 67 71
Wet 73 72
Snow 56 –
Comfort 68 69
Noise 63 –
Treadwear 64 65
Handling (owners) 67 71

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

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score

ZIEX ZE914 EcoRun

NanoEnergy R38

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 ZIEX ZE914 EcoRun

Pros

  • Exceptional value for money compared to premium brands
  • Strong and predictable wet and dry traction
  • Stiff sidewalls providing crisp steering response and good road feedback

Cons

  • Increased road noise or droning, particularly on coarse asphalt or as the tire wears
  • Stiffer ride quality and harshness over bumps due to fortified sidewalls
  • Wet grip performance dropping noticeably as the tread wears down
All owner themes in the ZIEX ZE914 EcoRun review

Tire B NanoEnergy R38

Pros

  • Reliable wet and dry grip with predictable handling limits
  • Good value for money compared to premium brand alternatives
  • Solid longevity and mileage, with respectable tread wear reported

Cons

  • Slightly increased road noise reported by some users
  • Limited size or availability challenges noted by consumers wanting replacements
All owner themes in the NanoEnergy R38 review

Specs side by side

Attribute A · Falken ZIEX ZE914 EcoRun B · Toyo NanoEnergy R38
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available17—
Rim diameters14″ – 18″—
Tread depth9/32″—
UTQG320 A A—
SidewallBlackwall—
Max pressure51 psi—

Which one should you actually buy?

Falken ZIEX ZE914 EcoRun

Toyo NanoEnergy R38

Narrow edge: Toyo NanoEnergy R38 — better dry. Where the Falken ZIEX ZE914 EcoRun is ahead, it is by less than 3 points. Toyo NanoEnergy R38 rests on little evidence so far (0 tests, 8 reviews), so read this result as provisional.

Pick tire B You want the most grip on dry roads

Toyo NanoEnergy R38 scores 71 vs 67 on dry.

Tire A · Falken ZIEX ZE914 EcoRun
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Tire B · Toyo NanoEnergy R38
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ZIEX ZE914 EcoRun or NanoEnergy R38?

Which is better in the wet, ZIEX ZE914 EcoRun or NanoEnergy R38?

Neither, by our numbers: 73 vs 72 on the wet score, within 3 points.

Which grips better on dry roads, ZIEX ZE914 EcoRun or NanoEnergy R38?

Toyo NanoEnergy R38, 71 vs 67 on our dry score.

Which is more comfortable, ZIEX ZE914 EcoRun or NanoEnergy R38?

Neither, by our numbers: 68 vs 69 on the comfort score, within 3 points.

Which lasts longer, ZIEX ZE914 EcoRun or NanoEnergy R38?

Neither, by our numbers: 64 vs 65 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