Tests 63 · 1 test Owners 65 · 3 reviews
Head-to-head
Updated
Bridgestone Battlax Sport Touring T31 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 1 + 1 road tests and 3 + 182 owner reviews. How we score
Diablo Rosso IV is ahead, 77–66
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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.
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65
Dry
Diablo Rosso IV +1075Why this score
Source Battlax Sport Touring T31 Diablo Rosso IV Professional tests (TWG score) · 1 / 1 tests 63 68 Reviews found online 68 86 Battlax Sport Touring T31: 60% × 62.9 + 40% × 68 = 65
Diablo Rosso IV: 60% × 67.8 + 40% × 86.3 = 75
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69
Wet
Diablo Rosso IV +1382Why this score
Source Battlax Sport Touring T31 Diablo Rosso IV Professional tests (TWG score) · – / 1 tests ≈ 70 (est.) 81 Reviews found online 69 83 Battlax Sport Touring T31: 60% × 69.5 (est.) + 40% × 68.5 = 69
Diablo Rosso IV: 60% × 81.4 + 40% × 82.5 = 82
No road tests of wet for Battlax Sport Touring T31. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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65
Comfort
Diablo Rosso IV +1176Why this score
Source Battlax Sport Touring T31 Diablo Rosso IV Professional tests (TWG score) ≈ 68 (est.) ≈ 71 (est.) Reviews found online 63 80 Battlax Sport Touring T31: 40% × 67.6 (est.) + 60% × 63.3 = 65
Diablo Rosso IV: 40% × 70.9 (est.) + 60% × 80.1 = 76
No road tests of comfort for Battlax Sport Touring T31. 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).
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62
Treadwear
Diablo Rosso IV +870Why this score
Source Battlax Sport Touring T31 Diablo Rosso IV Professional tests (TWG score) ≈ 64 (est.) ≈ 68 (est.) Reviews found online 60 71 Battlax Sport Touring T31: 60% × 64.1 (est.) + 40% × 59.8 = 62
Diablo Rosso IV: 60% × 68.3 (est.) + 40% × 71.4 = 70
No road tests of treadwear for Battlax Sport Touring T31. 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).
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68
Handling (owners)
Diablo Rosso IV +1886Why this score
Source Battlax Sport Touring T31 Diablo Rosso IV Reviews found online 68 86
Scores at a glance
| Category | Bridgestone Battlax Sport Touring T31 | Pirelli Diablo Rosso IV |
|---|---|---|
| Relative Score | 66 | 77 |
| Dry | 65 | 75 |
| Wet | 69 | 82 |
| Comfort | 65 | 76 |
| Treadwear | 62 | 70 |
| Handling (owners) | 68 | 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
66
/ 100
Battlax Sport Touring T31
77
/ 100
Diablo Rosso IV
The professional test results behind the scores
Per discipline: the average % of the best tire over every test both tires were in, and how many of those tests each one won. “Different tests” rows compare results from separate tests.
| Discipline | Category | Battlax Sport Touring T31 | Diablo Rosso IV | Δ | Head-to-head |
|---|---|---|---|---|---|
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #6/6 2020 Motorcycle Sports Touring Tyre Test | #5/12 2025 Sport and Hypersport Motorcycle Tyre Test | – | Different tests |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Battlax Sport Touring T31
Pros
- Strong dry grip on smooth road surfaces
- High level of road feedback and communication
- Capable of maintaining pace with sport-oriented motorcycles
Cons
- Tendency to skip or feel unsettled on rough, uneven road surfaces
- Feedback can occasionally be misleading, creating a false sensation of slipping
- Wet grip performance is considered good but not class-leading compared to dedicated sport tires
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
Specs side by side
| Attribute | A · Bridgestone Battlax Sport Touring T31 | B · Pirelli Diablo Rosso IV |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
66
/ 100
Bridgestone Battlax Sport Touring T31
77
/ 100
Pirelli Diablo Rosso IV
Winner: Pirelli Diablo Rosso IV — better handling, wet and comfort. It leads or ties in every category we score. Bridgestone Battlax Sport Touring T31 rests on little evidence so far (1 test, 3 reviews), so read this result as provisional.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 86 vs 68 on handling.
Pick tire B
Your priority is wet-weather safety
Pirelli Diablo Rosso IV scores 82 vs 69 on wet.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso IV scores 76 vs 65 on comfort.
Pick tire B
You want the most grip on dry roads
Pirelli Diablo Rosso IV scores 75 vs 65 on dry.
Tire A · Bridgestone Battlax Sport Touring T31
Tire B · Pirelli Diablo Rosso IV
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Battlax Sport Touring T31 or Diablo Rosso IV?
Which is better in the wet, Battlax Sport Touring T31 or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 82 vs 69 on our wet score.
Which grips better on dry roads, Battlax Sport Touring T31 or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 75 vs 65 on our dry score.
Which is more comfortable, Battlax Sport Touring T31 or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 76 vs 65 on our comfort score.
Which lasts longer, Battlax Sport Touring T31 or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 70 vs 62 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