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Bridgestone Battlax BT 021 looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Bridgestone Battlax BT 021 vs Pirelli Diablo Rosso II — 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 10 + 19 owner reviews. How we score

Diablo Rosso II is ahead, 73–67

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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. 68

    Dry

    Diablo Rosso II +7
    75
    Why this score
    SourceBattlax BT 021Diablo Rosso II
    Professional tests (TWG score)≈ 68 (est.)≈ 72 (est.)
    Reviews found online6879

    Battlax BT 021: 60% × 67.9 (est.) + 40% × 67.9 = 68

    Diablo Rosso II: 60% × 72.3 (est.) + 40% × 78.5 = 75

    No road tests of dry for Battlax BT 021. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

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

  2. 67

    Wet

    Diablo Rosso II +5
    72
    Why this score
    SourceBattlax BT 021Diablo Rosso II
    Professional tests (TWG score)≈ 68 (est.)≈ 72 (est.)
    Reviews found online6673

    Battlax BT 021: 60% × 68.1 (est.) + 40% × 65.9 = 67

    Diablo Rosso II: 60% × 71.9 (est.) + 40% × 72.8 = 72

    No road tests of wet for Battlax BT 021. 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 II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 66

    Comfort

    Diablo Rosso II +7
    73
    Why this score
    SourceBattlax BT 021Diablo Rosso II
    Professional tests (TWG score)≈ 68 (est.)≈ 70 (est.)
    Reviews found online6475

    Battlax BT 021: 40% × 67.8 (est.) + 60% × 64.4 = 66

    Diablo Rosso II: 40% × 70 (est.) + 60% × 75.2 = 73

    No road tests of comfort for Battlax BT 021. 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 II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  4. 66

    Treadwear

    Diablo Rosso II +1
    67
    Why this score
    SourceBattlax BT 021Diablo Rosso II
    Professional tests (TWG score)≈ 66 (est.)≈ 67 (est.)
    Reviews found online6667

    Battlax BT 021: 60% × 66.3 (est.) + 40% × 65.8 = 66

    Diablo Rosso II: 60% × 66.7 (est.) + 40% × 66.9 = 67

    No road tests of treadwear for Battlax BT 021. 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 II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  5. 65

    Handling (owners)

    Diablo Rosso II +12
    77
    Why this score
    SourceBattlax BT 021Diablo Rosso II
    Reviews found online6577
Scores at a glance
CategoryBridgestone Battlax BT 021Pirelli Diablo Rosso II
Relative Score 67 73
Dry 68 75
Wet 67 72
Comfort 66 73
Treadwear 66 67
Handling (owners) 65 77

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.

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Less important
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Neutral
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Recomputed
Headline score
± 8

Battlax BT 021

± 8

Diablo Rosso II

Pros, cons & observations

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

Tire A Battlax BT 021

Pros

  • Exceptional tread longevity and durability for high-mileage commuters
  • Reliable performance for motorway and long-distance riding
  • Strong grip characteristics when tire pressures are correctly calibrated

Cons

  • Handling characteristics can feel unpredictable or heavy if pressures are not perfectly matched to the bike
  • Reports of poor wet-weather grip and lack of rider feedback
  • Tendency for the center of the tire to flatten out significantly during high-mileage motorway use
All owner themes in the Battlax BT 021 review

Tire B Diablo Rosso II

Pros

  • Exceptional dry-weather grip and cornering stability
  • Rapid warm-up time for immediate performance
  • Predictable handling and high levels of rider feedback

Cons

  • Inconsistent tread life, with reports of rapid center wear and cupping
  • Polarized wet-weather performance ranging from 'glue-like' to 'dangerous'
  • Tendency for the rear tire to square off over time
All owner themes in the Diablo Rosso II review

Specs side by side

Attribute A · Bridgestone Battlax BT 021 B · Pirelli Diablo Rosso II
CategorySummerSummer
Vehicle typeMotorcycleMotorcycle

Which one should you actually buy?

Bridgestone Battlax BT 021

Pirelli Diablo Rosso II

Winner: Pirelli Diablo Rosso II — better handling, dry and comfort. It leads or ties in every category we score. Bridgestone Battlax BT 021 rests on little evidence so far (0 tests, 10 reviews), so read this result as provisional. Pirelli Diablo Rosso II rests on little evidence so far (0 tests, 19 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Pirelli Diablo Rosso II scores 77 vs 65 on handling.

Pick tire B You want the most grip on dry roads

Pirelli Diablo Rosso II scores 75 vs 68 on dry.

Pick tire B You want the most comfortable ride

Pirelli Diablo Rosso II scores 73 vs 66 on comfort.

Pick tire B Your priority is wet-weather safety

Pirelli Diablo Rosso II scores 72 vs 67 on wet.

Tire A · Bridgestone Battlax BT 021
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Tire B · Pirelli Diablo Rosso II
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Battlax BT 021 or Diablo Rosso II?

Which is better in the wet, Battlax BT 021 or Diablo Rosso II?

Pirelli Diablo Rosso II, 72 vs 67 on our wet score.

Which grips better on dry roads, Battlax BT 021 or Diablo Rosso II?

Pirelli Diablo Rosso II, 75 vs 68 on our dry score.

Which is more comfortable, Battlax BT 021 or Diablo Rosso II?

Pirelli Diablo Rosso II, 73 vs 66 on our comfort score.

Which lasts longer, Battlax BT 021 or Diablo Rosso II?

Neither, by our numbers: 66 vs 67 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