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Bridgestone Battlax Hypersport S21 vs Pirelli Diablo Rosso III — 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 + 0 road tests and 7 + 9 owner reviews. How we score

Too close to call: Battlax Hypersport S21 74, Diablo Rosso III 73.

Check price on Amazon · Battlax Hypersport S21 Check price on Amazon · Diablo Rosso III
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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. 77

    Dry

    Battlax Hypersport S21 +3
    74
    Why this score
    SourceBattlax Hypersport S21Diablo Rosso III
    Professional tests (TWG score)≈ 74 (est.)≈ 72 (est.)
    Reviews found online8278

    Battlax Hypersport S21: 60% × 73.8 (est.) + 40% × 81.7 = 77

    Diablo Rosso III: 60% × 72.1 (est.) + 40% × 77.6 = 74

    No road tests of dry for Battlax Hypersport S21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

    No road tests of dry for Diablo Rosso III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 76

    Wet

    Battlax Hypersport S21 +2
    74
    Why this score
    SourceBattlax Hypersport S21Diablo Rosso III
    Professional tests (TWG score)≈ 75 (est.)≈ 73 (est.)
    Reviews found online7875

    Battlax Hypersport S21: 60% × 74.8 (est.) + 40% × 78.1 = 76

    Diablo Rosso III: 60% × 73.2 (est.) + 40% × 75.1 = 74

    No road tests of wet for Battlax Hypersport S21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

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

  3. 73

    Comfort

    Level
    73
    Why this score
    SourceBattlax Hypersport S21Diablo Rosso III
    Professional tests (TWG score)≈ 70 (est.)≈ 70 (est.)
    Reviews found online7476

    Battlax Hypersport S21: 40% × 70.1 (est.) + 60% × 74.4 = 73

    Diablo Rosso III: 40% × 70.3 (est.) + 60% × 75.5 = 73

    No road tests of comfort for Battlax Hypersport S21 or Diablo Rosso III. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  4. 63

    Treadwear

    Diablo Rosso III +4
    67
    Why this score
    SourceBattlax Hypersport S21Diablo Rosso III
    Professional tests (TWG score)≈ 64 (est.)≈ 66 (est.)
    Reviews found online6067

    Battlax Hypersport S21: 60% × 64.1 (est.) + 40% × 60.3 = 63

    Diablo Rosso III: 60% × 66.4 (est.) + 40% × 66.8 = 67

    No road tests of treadwear for Battlax Hypersport S21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

    No road tests of treadwear for Diablo Rosso III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  5. 83

    Handling (owners)

    Battlax Hypersport S21 +4
    79
    Why this score
    SourceBattlax Hypersport S21Diablo Rosso III
    Reviews found online8379
Scores at a glance
CategoryBridgestone Battlax Hypersport S21Pirelli Diablo Rosso III
Relative Score 74 73
Dry 77 74
Wet 76 74
Comfort 73 73
Treadwear 63 67
Handling (owners) 83 79

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
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Recomputed
Headline score
± 8

Battlax Hypersport S21

± 8

Diablo Rosso III

Pros, cons & observations

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

Tire A Battlax Hypersport S21

Pros

  • Exceptional dry grip and cornering stability
  • Rapid warm-up time
  • High performance capability suitable for track days

Cons

  • Limited tread longevity
  • Rapid wear on the center compound during straight-line riding
  • Reduced traction on painted road markings and pedestrian crossings
All owner themes in the Battlax Hypersport S21 review

Tire B Diablo Rosso III

Pros

  • Exceptional dry grip and predictable handling at various lean angles
  • Improved wet-weather performance compared to more aggressive track-oriented tires
  • Fast warm-up times providing immediate confidence

Cons

  • Inconsistent tread life, with some users reporting premature rear tire wear
  • Potential for rapid degradation under aggressive riding styles
  • Isolated reports of structural issues such as delamination
All owner themes in the Diablo Rosso III review

Specs side by side

Attribute A · Bridgestone Battlax Hypersport S21 B · Pirelli Diablo Rosso III
CategorySummerSummer
Vehicle typeMotorcycleMotorcycle

Which one should you actually buy?

Bridgestone Battlax Hypersport S21

Pirelli Diablo Rosso III

Too close to call: Bridgestone Battlax Hypersport S21 and Pirelli Diablo Rosso III are within 2 points overall. Bridgestone Battlax Hypersport S21 is stronger on dry. Pirelli Diablo Rosso III is stronger on treadwear. Bridgestone Battlax Hypersport S21 rests on little evidence so far (0 tests, 7 reviews), so read this result as provisional. Pirelli Diablo Rosso III rests on little evidence so far (0 tests, 9 reviews), so read this result as provisional.

Pick tire B You want the longest tread life

Pirelli Diablo Rosso III scores 67 vs 63 on treadwear.

Pick tire A You want the most grip on dry roads

Bridgestone Battlax Hypersport S21 scores 77 vs 74 on dry.

Tire A · Bridgestone Battlax Hypersport S21
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Tire B · Pirelli Diablo Rosso III
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Battlax Hypersport S21 or Diablo Rosso III?

Which is better in the wet, Battlax Hypersport S21 or Diablo Rosso III?

Neither, by our numbers: 76 vs 74 on the wet score, within 3 points.

Which grips better on dry roads, Battlax Hypersport S21 or Diablo Rosso III?

Bridgestone Battlax Hypersport S21, 77 vs 74 on our dry score.

Which is more comfortable, Battlax Hypersport S21 or Diablo Rosso III?

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

Which lasts longer, Battlax Hypersport S21 or Diablo Rosso III?

Pirelli Diablo Rosso III, 67 vs 63 on our treadwear score.

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