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Dunlop Roadsmart looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Dunlop Roadsmart vs Pirelli Diablo Rosso IV — 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 + 1 road tests and 13 + 182 owner reviews. How we score

Too close to call: Roadsmart 76, Diablo Rosso IV 77.

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Dunlop Roadsmart
Tire ADunlop

Roadsmart

Summer

± 8Provisional

Tests – · none yet Owners 78 · 13 reviews

Pirelli Diablo Rosso IV
Tire BPirelli

Diablo Rosso IV

Summer

± 7

Tests 75 · 1 test Owners 81 · 182 reviews

Best test result: #5 of 12 in 2025 Sport and Hypersport Motorcycle Tyre Test (wet handling)

Category by category

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

  1. 75

    Dry

    Level
    75
    Why this score
    SourceRoadsmartDiablo Rosso IV
    Professional tests (TWG score) · – / 1 tests≈ 72 (est.)68
    Reviews found online7986

    Roadsmart: 60% × 72.4 (est.) + 40% × 78.7 = 75

    Diablo Rosso IV: 60% × 67.8 + 40% × 86.3 = 75

    No road tests of dry for Roadsmart. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 78

    Wet

    Diablo Rosso IV +4
    82
    Why this score
    SourceRoadsmartDiablo Rosso IV
    Professional tests (TWG score) · – / 1 tests≈ 77 (est.)81
    Reviews found online8183

    Roadsmart: 60% × 76.5 (est.) + 40% × 81.4 = 78

    Diablo Rosso IV: 60% × 81.4 + 40% × 82.5 = 82

    No road tests of wet for Roadsmart. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 75

    Comfort

    Diablo Rosso IV +1
    76
    Why this score
    SourceRoadsmartDiablo Rosso IV
    Professional tests (TWG score)≈ 71 (est.)≈ 71 (est.)
    Reviews found online7880

    Roadsmart: 40% × 70.5 (est.) + 60% × 77.9 = 75

    Diablo Rosso IV: 40% × 70.9 (est.) + 60% × 80.1 = 76

    No road tests of comfort for Roadsmart. 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 Diablo Rosso IV. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  4. 71

    Treadwear

    Roadsmart +1
    70
    Why this score
    SourceRoadsmartDiablo Rosso IV
    Professional tests (TWG score)≈ 69 (est.)≈ 68 (est.)
    Reviews found online7471

    Roadsmart: 60% × 69.2 (est.) + 40% × 74 = 71

    Diablo Rosso IV: 60% × 68.3 (est.) + 40% × 71.4 = 70

    No road tests of treadwear for Roadsmart. 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 Diablo Rosso IV. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  5. 80

    Handling (owners)

    Diablo Rosso IV +6
    86
    Why this score
    SourceRoadsmartDiablo Rosso IV
    Reviews found online8086
Scores at a glance
CategoryDunlop RoadsmartPirelli Diablo Rosso IV
Relative Score 76 77
Dry 75 75
Wet 78 82
Comfort 75 76
Treadwear 71 70
Handling (owners) 80 86

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
± 8

Roadsmart

± 7

Diablo Rosso IV

Pros, cons & observations

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

Tire A Roadsmart

Pros

  • Excellent grip in both wet and dry conditions
  • Neutral and predictable steering characteristics
  • High level of rider confidence during cornering

Cons

  • Tendency for the rear tire to square off with mileage
  • Soft shoulder rubber may wear faster than the center
  • Occasional reports of rear wheel slippage in wet conditions for some riders
All owner themes in the Roadsmart review

Tire B Diablo Rosso IV

Pros

  • Exceptional dry and wet grip with a high level of rider confidence
  • Fast warm-up time and predictable handling at deep lean angles
  • Improved steering precision and turn-in compared to previous generations like the Diablo Rosso III

Cons

  • Higher price point compared to some competitors and previous models
  • Noticeable reduction in grip and increased rear wheel spin as the tires wear down
  • Requires full operating temperature for optimal performance late in its life cycle
All owner themes in the Diablo Rosso IV review

Specs side by side

Attribute A · Dunlop Roadsmart B · Pirelli Diablo Rosso IV
CategorySummerSummer
Vehicle typeMotorcycleMotorcycle

Which one should you actually buy?

Dunlop Roadsmart

Pirelli Diablo Rosso IV

Too close to call: Dunlop Roadsmart and Pirelli Diablo Rosso IV are within 2 points overall. Pirelli Diablo Rosso IV is stronger on handling and wet. Dunlop Roadsmart rests on little evidence so far (0 tests, 13 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Pirelli Diablo Rosso IV scores 86 vs 80 on handling.

Pick tire B Your priority is wet-weather safety

Pirelli Diablo Rosso IV scores 82 vs 78 on wet.

Tire A · Dunlop Roadsmart
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Tire B · Pirelli Diablo Rosso IV
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Roadsmart or Diablo Rosso IV?

Which is better in the wet, Roadsmart or Diablo Rosso IV?

Pirelli Diablo Rosso IV, 82 vs 78 on our wet score.

Which grips better on dry roads, Roadsmart or Diablo Rosso IV?

Neither, by our numbers: 75 vs 75 on the dry score, within 3 points.

Which is more comfortable, Roadsmart or Diablo Rosso IV?

Neither, by our numbers: 75 vs 76 on the comfort score, within 3 points.

Which lasts longer, Roadsmart or Diablo Rosso IV?

Neither, by our numbers: 71 vs 70 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