Tests 75 · 1 test Owners 81 · 182 reviews
Best test result: #5 of 12 in 2025 Sport and Hypersport Motorcycle Tyre Test (wet handling)
Head-to-head
Updated
Pirelli Diablo Rosso IV vs Pirelli Scorpion Trail 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 1 + 0 road tests and 182 + 9 owner reviews. How we score
Diablo Rosso IV is ahead, 77–68
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Tests – · none yet Owners 66 · 9 reviews
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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75
Dry
Diablo Rosso IV +669Why this score
Source Diablo Rosso IV Scorpion Trail II Professional tests (TWG score) · 1 / – tests 68 ≈ 69 (est.) Reviews found online 86 70 Diablo Rosso IV: 60% × 67.8 + 40% × 86.3 = 75
Scorpion Trail II: 60% × 68.8 (est.) + 40% × 70.1 = 69
No road tests of dry for Scorpion Trail II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
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82
Wet
Diablo Rosso IV +1468Why this score
Source Diablo Rosso IV Scorpion Trail II Professional tests (TWG score) · 1 / – tests 81 ≈ 68 (est.) Reviews found online 83 66 Diablo Rosso IV: 60% × 81.4 + 40% × 82.5 = 82
Scorpion Trail II: 60% × 68.4 (est.) + 40% × 66.4 = 68
No road tests of wet for Scorpion Trail II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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76
Comfort
Diablo Rosso IV +868Why this score
Source Diablo Rosso IV Scorpion Trail II Professional tests (TWG score) ≈ 71 (est.) ≈ 68 (est.) Reviews found online 80 68 Diablo Rosso IV: 40% × 70.9 (est.) + 60% × 80.1 = 76
Scorpion Trail II: 40% × 68.5 (est.) + 60% × 67.8 = 68
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).
No road tests of comfort for Scorpion Trail II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
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70
Treadwear
Diablo Rosso IV +763Why this score
Source Diablo Rosso IV Scorpion Trail II Professional tests (TWG score) ≈ 68 (est.) ≈ 65 (est.) Reviews found online 71 61 Diablo Rosso IV: 60% × 68.3 (est.) + 40% × 71.4 = 70
Scorpion Trail II: 60% × 64.5 (est.) + 40% × 61 = 63
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).
No road tests of treadwear for Scorpion Trail II. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
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86
Handling (owners)
Diablo Rosso IV +1571Why this score
Source Diablo Rosso IV Scorpion Trail II Reviews found online 86 71
Scores at a glance
| Category | Pirelli Diablo Rosso IV | Pirelli Scorpion Trail II |
|---|---|---|
| Relative Score | 77 | 68 |
| Dry | 75 | 69 |
| Wet | 82 | 68 |
| Comfort | 76 | 68 |
| Treadwear | 70 | 63 |
| Handling (owners) | 86 | 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
77
/ 100
Diablo Rosso IV
68
/ 100
Scorpion Trail II
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A 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
Tire B Scorpion Trail II
Pros
- Excellent grip and confidence on dry pavement
- Strong performance on light off-road trails and varied surfaces like gravel and dirt
- Quick warm-up time in favorable conditions
Cons
- Poor wet-weather performance and susceptibility to hydroplaning
- Twitchy or unstable handling characteristics in rain
- Rapid tread wear and premature flattening
Specs side by side
| Attribute | A · Pirelli Diablo Rosso IV | B · Pirelli Scorpion Trail II |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
77
/ 100
Pirelli Diablo Rosso IV
68
/ 100
Pirelli Scorpion Trail II
Winner: Pirelli Diablo Rosso IV — better handling, wet and comfort. It leads or ties in every category we score. Pirelli Scorpion Trail II rests on little evidence so far (0 tests, 9 reviews), so read this result as provisional.
Pick tire A
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 86 vs 71 on handling.
Pick tire A
Your priority is wet-weather safety
Pirelli Diablo Rosso IV scores 82 vs 68 on wet.
Pick tire A
You want the most comfortable ride
Pirelli Diablo Rosso IV scores 76 vs 68 on comfort.
Pick tire A
You want the longest tread life
Pirelli Diablo Rosso IV scores 70 vs 63 on treadwear.
Tire A · Pirelli Diablo Rosso IV
Tire B · Pirelli Scorpion Trail II
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Diablo Rosso IV or Scorpion Trail II?
Which is better in the wet, Diablo Rosso IV or Scorpion Trail II?
Pirelli Diablo Rosso IV, 82 vs 68 on our wet score.
Which grips better on dry roads, Diablo Rosso IV or Scorpion Trail II?
Pirelli Diablo Rosso IV, 75 vs 69 on our dry score.
Which is more comfortable, Diablo Rosso IV or Scorpion Trail II?
Pirelli Diablo Rosso IV, 76 vs 68 on our comfort score.
Which lasts longer, Diablo Rosso IV or Scorpion Trail II?
Pirelli Diablo Rosso IV, 70 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