Tests 53 · 1 test Owners 62 · 8 reviews
Best test result: #4 of 12 in 2025 Sport and Hypersport Motorcycle Tyre Test (dry handling)
Head-to-head
Updated
Dunlop SportSmart TT 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 8 + 184 owner reviews. How we score
Diablo Rosso IV is ahead, 80–60
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Tests 75 · 1 test Owners 85 · 184 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.
-
76
Dry
Diablo Rosso IV +177Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) · 1 / 1 tests 76 68 Reviews found online 77 91 Dry Handling (% of best) · 1 shared test · wins 1–0 99% 97% SportSmart TT: 60% × 75.8 + 40% × 77.2 = 76
Diablo Rosso IV: 60% × 67.8 + 40% × 91.4 = 77
-
34
Wet
Diablo Rosso IV +5084Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) · 1 / 1 tests 29 81 Reviews found online 42 87 Wet Handling (% of best) · 1 shared test · wins 0–1 87% 97% SportSmart TT: 60% × 29.2 + 40% × 42.1 = 34
Diablo Rosso IV: 60% × 81.4 + 40% × 86.9 = 84
-
66
Comfort
Diablo Rosso IV +1480Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) ≈ 68 (est.) ≈ 72 (est.) Reviews found online 64 85 SportSmart TT: 40% × 67.8 (est.) + 60% × 64.3 = 66
Diablo Rosso IV: 40% × 71.9 (est.) + 60% × 84.6 = 80
No road tests of comfort for SportSmart TT. 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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64
Treadwear
Diablo Rosso IV +771Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) ≈ 65 (est.) ≈ 69 (est.) Reviews found online 63 75 SportSmart TT: 60% × 65.2 (est.) + 40% × 62.9 = 64
Diablo Rosso IV: 60% × 69.4 (est.) + 40% × 74.6 = 71
No road tests of treadwear for SportSmart TT. 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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78
Handling (owners)
Diablo Rosso IV +1391Why this score
Source SportSmart TT Diablo Rosso IV Reviews found online 78 91
Scores at a glance
| Category | Dunlop SportSmart TT | Pirelli Diablo Rosso IV |
|---|---|---|
| Relative Score | 60 | 80 |
| Dry | 76 | 77 |
| Wet | 34 | 84 |
| Comfort | 66 | 80 |
| Treadwear | 64 | 71 |
| Handling (owners) | 78 | 91 |
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
60
/ 100
SportSmart TT
80
/ 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.
In the overall rankings of 1 tests that ran both, Dunlop SportSmart TT finished ahead 0 times and Pirelli Diablo Rosso IV 1 times.
| Discipline | Category | SportSmart TT | Diablo Rosso IV | Δ | Head-to-head |
|---|---|---|---|---|---|
| Dry Handling | Dry | 99% | 97% | +1.2 | 1–0 in 1 shared test Newest: 2025 Sport and Hypersport Motorcycle Tyre Test · 190/55 R17 |
| Wet Handling | Wet | 87% | 97% | −10.0 | 0–1 in 1 shared test Newest: 2025 Sport and Hypersport Motorcycle Tyre Test · 190/55 R17 |
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #10/12 | #5/12 | – | 0–1 in 1 shared test Newest: 2025 Sport and Hypersport Motorcycle Tyre Test · 190/55 R17 |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A SportSmart TT
Pros
- Outstanding dry grip and traction during cornering and acceleration
- Fast warmup time on both street and track
- High stability and excellent steering feedback
Cons
- Poor performance and lack of grip in wet conditions
- Slower warmup and potential slipping in colder weather
- Stiffer carcass reduces comfort and increases sensitivity to road imperfections
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 · Dunlop SportSmart TT | B · Pirelli Diablo Rosso IV |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
60
/ 100
Dunlop SportSmart TT
80
/ 100
Pirelli Diablo Rosso IV
Winner: Pirelli Diablo Rosso IV — better wet, comfort and handling. It leads or ties in every category we score. Dunlop SportSmart TT rests on little evidence so far (1 test, 8 reviews), so read this result as provisional.
Pick tire B
Your priority is wet-weather safety
Pirelli Diablo Rosso IV scores 84 vs 34 on wet.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso IV scores 80 vs 66 on comfort.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 91 vs 78 on handling.
Pick tire B
You want the longest tread life
Pirelli Diablo Rosso IV scores 71 vs 64 on treadwear.
Tire A · Dunlop SportSmart TT
Tire B · Pirelli Diablo Rosso IV
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SportSmart TT or Diablo Rosso IV?
Which is better in the wet, SportSmart TT or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 84 vs 34 on our wet score.
Which grips better on dry roads, SportSmart TT or Diablo Rosso IV?
Neither, by our numbers: 76 vs 77 on the dry score, within 3 points.
Which is more comfortable, SportSmart TT or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 80 vs 66 on our comfort score.
Which lasts longer, SportSmart TT or Diablo Rosso IV?
Pirelli Diablo Rosso IV, 71 vs 64 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