Tests – · none yet Owners 57 · 13 reviews
Head-to-head
Updated
Bridgestone S20 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 13 + 9 owner reviews. How we score
Diablo Rosso III is ahead, 73–63
Add your size for an exact match
/R
Both Amazon links then search this exact size.
TireWheelGuide may earn a commission from purchases made through these links.
Tests – · none yet Owners 74 · 9 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
65
Dry
Diablo Rosso III +974Why this score
Source S20 Diablo Rosso III Professional tests (TWG score) ≈ 66 (est.) ≈ 72 (est.) Reviews found online 64 77 S20: 60% × 66.1 (est.) + 40% × 63.5 = 65
Diablo Rosso III: 60% × 71.7 (est.) + 40% × 77.1 = 74
No road tests of dry for S20. 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 III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
-
66
Wet
Diablo Rosso III +874Why this score
Source S20 Diablo Rosso III Professional tests (TWG score) ≈ 67 (est.) ≈ 73 (est.) Reviews found online 65 75 S20: 60% × 67.5 (est.) + 40% × 64.8 = 66
Diablo Rosso III: 60% × 73 (est.) + 40% × 74.9 = 74
No road tests of wet for S20. 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).
-
65
Comfort
Diablo Rosso III +873Why this score
Source S20 Diablo Rosso III Professional tests (TWG score) ≈ 68 (est.) ≈ 70 (est.) Reviews found online 64 75 S20: 40% × 67.6 (est.) + 60% × 63.5 = 65
Diablo Rosso III: 40% × 69.9 (est.) + 60% × 75 = 73
No road tests of comfort for S20. 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 III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
-
50
Treadwear
Diablo Rosso III +1767Why this score
Source S20 Diablo Rosso III Professional tests (TWG score) ≈ 57 (est.) ≈ 67 (est.) Reviews found online 39 67 S20: 60% × 56.7 (est.) + 40% × 39.4 = 50
Diablo Rosso III: 60% × 66.7 (est.) + 40% × 67 = 67
No road tests of treadwear for S20. 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 III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
-
67
Handling (owners)
Diablo Rosso III +1279Why this score
Source S20 Diablo Rosso III Reviews found online 67 79
Scores at a glance
| Category | Bridgestone S20 | Pirelli Diablo Rosso III |
|---|---|---|
| Relative Score | 63 | 73 |
| Dry | 65 | 74 |
| Wet | 66 | 74 |
| Comfort | 65 | 73 |
| Treadwear | 50 | 67 |
| Handling (owners) | 67 | 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
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
63
/ 100
S20
73
/ 100
Diablo Rosso III
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A S20
Pros
- Exceptional grip levels in both wet and dry conditions
- Progressive and predictable handling characteristics
- Strong performance during aggressive road riding and track use
Cons
- Very short tread life, particularly on high-torque motorcycles
- Rapid degradation and squaring off of the rear tire
- Front tire can be slow to reach optimal operating temperature
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
Specs side by side
| Attribute | A · Bridgestone S20 | B · Pirelli Diablo Rosso III |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
63
/ 100
Bridgestone S20
73
/ 100
Pirelli Diablo Rosso III
Winner: Pirelli Diablo Rosso III — better treadwear, handling and dry. It leads or ties in every category we score. Bridgestone S20 rests on little evidence so far (0 tests, 13 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 50 on treadwear.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso III scores 79 vs 67 on handling.
Pick tire B
You want the most grip on dry roads
Pirelli Diablo Rosso III scores 74 vs 65 on dry.
Pick tire B
Your priority is wet-weather safety
Pirelli Diablo Rosso III scores 74 vs 66 on wet.
Tire A · Bridgestone S20
Tire B · Pirelli Diablo Rosso III
TireWheelGuide may earn a commission from purchases made through these links.
S20 or Diablo Rosso III?
Which is better in the wet, S20 or Diablo Rosso III?
Pirelli Diablo Rosso III, 74 vs 66 on our wet score.
Which grips better on dry roads, S20 or Diablo Rosso III?
Pirelli Diablo Rosso III, 74 vs 65 on our dry score.
Which is more comfortable, S20 or Diablo Rosso III?
Pirelli Diablo Rosso III, 73 vs 65 on our comfort score.
Which lasts longer, S20 or Diablo Rosso III?
Pirelli Diablo Rosso III, 67 vs 50 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