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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

Hankook K425 Kinergy Eco 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 0 + 0 road tests and 49 + 8 owner reviews. How we score

NanoEnergy R38 leads, 70–67 Narrow edge

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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
    SourceK425 Kinergy EcoNanoEnergy R38
    Professional tests (TWG score)≈ 67 (est.)≈ 70 (est.)
    Reviews found online6772

    K425 Kinergy Eco: 60% × 67.3 (est.) + 40% × 66.7 = 67

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

    No road tests of dry for K425 Kinergy Eco. 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 NanoEnergy R38. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 70

    Wet

    NanoEnergy R38 +2
    72
    Why this score
    SourceK425 Kinergy EcoNanoEnergy R38
    Professional tests (TWG score)≈ 70 (est.)≈ 72 (est.)
    Reviews found online6973

    K425 Kinergy Eco: 60% × 69.6 (est.) + 40% × 69.4 = 70

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

    No road tests of wet for K425 Kinergy Eco. 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 NanoEnergy R38. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 67

    Comfort

    NanoEnergy R38 +2
    69
    Why this score
    SourceK425 Kinergy EcoNanoEnergy R38
    Professional tests (TWG score)≈ 69 (est.)≈ 69 (est.)
    Reviews found online6669

    K425 Kinergy Eco: 60% × 68.5 (est.) + 40% × 65.5 = 67

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

    No road tests of comfort for K425 Kinergy Eco or NanoEnergy R38. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  4. 63

    Treadwear

    NanoEnergy R38 +2
    65
    Why this score
    SourceK425 Kinergy EcoNanoEnergy R38
    Professional tests (TWG score)≈ 64 (est.)≈ 65 (est.)
    Reviews found online6165

    K425 Kinergy Eco: 60% × 64.3 (est.) + 40% × 61.2 = 63

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

    No road tests of treadwear for K425 Kinergy Eco. 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).

  5. 66

    Handling (owners)

    NanoEnergy R38 +5
    71
    Why this score
    SourceK425 Kinergy EcoNanoEnergy R38
    Reviews found online6671
Scores at a glance
CategoryHankook K425 Kinergy EcoToyo NanoEnergy R38
Relative Score 67 70
Dry 67 71
Wet 70 72
Comfort 67 69
Treadwear 63 65
Handling (owners) 66 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
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score

K425 Kinergy Eco

NanoEnergy R38

Pros, cons & observations

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

Tire A K425 Kinergy Eco

Pros

  • Exceptional tread life and durability
  • Strong value proposition compared to premium brands
  • Reliable and stable handling in dry conditions

Cons

  • Inconsistent or poor wet-weather traction
  • High levels of cabin noise, particularly on coarse asphalt
  • Stiff, rigid ride quality
All owner themes in the K425 Kinergy Eco 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 · Hankook K425 Kinergy Eco B · Toyo NanoEnergy R38
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available27—
Rim diameters13″ – 16″—

Which one should you actually buy?

Hankook K425 Kinergy Eco

Toyo NanoEnergy R38

Narrow edge: Toyo NanoEnergy R38 — better dry. It leads or ties in every category we score. 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 · Hankook K425 Kinergy Eco
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Tire B · Toyo NanoEnergy R38
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K425 Kinergy Eco or NanoEnergy R38?

Which is better in the wet, K425 Kinergy Eco or NanoEnergy R38?

Neither, by our numbers: 70 vs 72 on the wet score, within 3 points.

Which grips better on dry roads, K425 Kinergy Eco or NanoEnergy R38?

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

Which is more comfortable, K425 Kinergy Eco or NanoEnergy R38?

Neither, by our numbers: 67 vs 69 on the comfort score, within 3 points.

Which lasts longer, K425 Kinergy Eco or NanoEnergy R38?

Neither, by our numbers: 63 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