Tests – · none yet Owners 76 · 19 reviews
Head-to-head
Updated
Michelin Pilot Road 4 vs Pirelli Diablo — 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 19 + 9 owner reviews. How we score
Pilot Road 4 is ahead, 74–67
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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.
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73
Dry
Pilot Road 4 +1063Why this score
Source Pilot Road 4 Diablo Professional tests (TWG score) ≈ 71 (est.) ≈ 64 (est.) Reviews found online 76 60 Pilot Road 4: 60% × 71.3 (est.) + 40% × 76 = 73
Diablo: 60% × 64.5 (est.) + 40% × 59.6 = 63
No road tests of dry for Pilot Road 4. 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. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
-
78
Wet
Pilot Road 4 +870Why this score
Source Pilot Road 4 Diablo Professional tests (TWG score) ≈ 76 (est.) ≈ 70 (est.) Reviews found online 81 70 Pilot Road 4: 60% × 76.1 (est.) + 40% × 80.5 = 78
Diablo: 60% × 70.2 (est.) + 40% × 69.8 = 70
No road tests of wet for Pilot Road 4. 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. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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73
Comfort
Pilot Road 4 +766Why this score
Source Pilot Road 4 Diablo Professional tests (TWG score) ≈ 70 (est.) ≈ 68 (est.) Reviews found online 75 64 Pilot Road 4: 40% × 69.9 (est.) + 60% × 74.7 = 73
Diablo: 40% × 67.7 (est.) + 60% × 64.1 = 66
No road tests of comfort for Pilot Road 4. 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. 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
Pilot Road 4 +268Why this score
Source Pilot Road 4 Diablo Professional tests (TWG score) ≈ 69 (est.) ≈ 67 (est.) Reviews found online 73 69 Pilot Road 4: 60% × 68.7 (est.) + 40% × 72.7 = 70
Diablo: 60% × 67.3 (est.) + 40% × 68.6 = 68
No road tests of treadwear for Pilot Road 4. 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. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
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75
Handling (owners)
Pilot Road 4 +1164Why this score
Source Pilot Road 4 Diablo Reviews found online 75 64
Scores at a glance
| Category | Michelin Pilot Road 4 | Pirelli Diablo |
|---|---|---|
| Relative Score | 74 | 67 |
| Dry | 73 | 63 |
| Wet | 78 | 70 |
| Comfort | 73 | 66 |
| Treadwear | 70 | 68 |
| Handling (owners) | 75 | 64 |
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
74
/ 100
Pilot Road 4
67
/ 100
Diablo
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Pilot Road 4
Pros
- Outstanding wet weather grip and performance
- Impressive tread life and mileage longevity for touring and commuting
- Predictable and confident handling in everyday dry and wet conditions
Cons
- Slippery when brand new, requiring a cautious break-in period
- Tread pattern can cause movement or a vague front-end feel in warmer weather
- Some riders experienced uneven wear or quicker wear on the front tire
Tire B Diablo
Pros
- Excellent dry grip once the tire reaches operating temperature
- Inspiring feedback and planted handling for confident cornering
- Strong performance in wet weather conditions
Cons
- Rapid rear tire wear and tendency to square off
- Requires significant warm-up time to reach optimal traction
- Can feel unstable or 'sketchy' in cold or damp conditions before warming up
Specs side by side
| Attribute | A · Michelin Pilot Road 4 | B · Pirelli Diablo |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
74
/ 100
Michelin Pilot Road 4
67
/ 100
Pirelli Diablo
Winner: Michelin Pilot Road 4 — better handling, dry and wet. It leads or ties in every category we score. Michelin Pilot Road 4 rests on little evidence so far (0 tests, 19 reviews), so read this result as provisional. Pirelli Diablo rests on little evidence so far (0 tests, 9 reviews), so read this result as provisional.
Pick tire A
You enjoy sharp, responsive handling
Michelin Pilot Road 4 scores 75 vs 64 on handling.
Pick tire A
You want the most grip on dry roads
Michelin Pilot Road 4 scores 73 vs 63 on dry.
Pick tire A
Your priority is wet-weather safety
Michelin Pilot Road 4 scores 78 vs 70 on wet.
Pick tire A
You want the most comfortable ride
Michelin Pilot Road 4 scores 73 vs 66 on comfort.
Tire A · Michelin Pilot Road 4
Tire B · Pirelli Diablo
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Pilot Road 4 or Diablo?
Which is better in the wet, Pilot Road 4 or Diablo?
Michelin Pilot Road 4, 78 vs 70 on our wet score.
Which grips better on dry roads, Pilot Road 4 or Diablo?
Michelin Pilot Road 4, 73 vs 63 on our dry score.
Which is more comfortable, Pilot Road 4 or Diablo?
Michelin Pilot Road 4, 73 vs 66 on our comfort score.
Which lasts longer, Pilot Road 4 or Diablo?
Neither, by our numbers: 70 vs 68 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