Tests 51 · 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): 60% professional tests, 40% owner reviews.
Diablo Rosso IV is ahead, 76–61
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Tests 74 · 1 test Owners 79 · 181 reviews
Best test result: #5 of 12 in 2025 Sport and Hypersport Motorcycle Tyre Test (overall ranking)
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
77
Dry
SportSmart TT +275Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) 75 68 Reviews found online 79 87 Dry Handling (% of best) 99% 97% -
31
Wet
Diablo Rosso IV +4980Why this score
Source SportSmart TT Diablo Rosso IV Professional tests (TWG score) 28 81 Reviews found online 36 80 Wet Handling (% of best) 87% 97% -
67
Comfort
Diablo Rosso IV +875Why this score
Source SportSmart TT Diablo Rosso IV Reviews found online 65 81 -
63
Treadwear
Diablo Rosso IV +366Why this score
Source SportSmart TT Diablo Rosso IV Reviews found online 61 66 -
78
Handling
Diablo Rosso IV +987Why this score
Source SportSmart TT Diablo Rosso IV Reviews found online 78 87
Scores at a glance
| Category | Dunlop SportSmart TT | Pirelli Diablo Rosso IV |
|---|---|---|
| Relative Score | 61 | 76 |
| Dry | 77 | 75 |
| Wet | 31 | 80 |
| Comfort | 67 | 75 |
| Treadwear | 63 | 66 |
| Handling | 78 | 87 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
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Recomputed
Headline score
61
/ 100
SportSmart TT
76
/ 100
Diablo Rosso IV
The professional test results behind the scores
Each result is shown as % of the best tire in that test. “Same test” rows are the strictest comparison: both tires were measured side by side.
| Discipline | Category | SportSmart TT | Diablo Rosso IV | Δ | Both? |
|---|---|---|---|---|---|
| Dry Handling | Dry | 99% #4/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | 97% #8/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | +1.2 | Same test |
| Overall Ranking | Overall | 10% #10/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | 20% #5/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | −10.0 | Same test |
| Wet Handling | Wet | 87% #11/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | 97% #5/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | −10.0 | Same test |
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?
61
/ 100
Dunlop SportSmart TT
76
/ 100
Pirelli Diablo Rosso IV
Winner: Pirelli Diablo Rosso IV — better wet, handling and comfort. It leads or ties in every category we score.
Pick tire B
Your priority is wet-weather safety
Pirelli Diablo Rosso IV scores 80 vs 31 on wet.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 87 vs 78 on handling.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso IV scores 75 vs 67 on comfort.
Pick tire B
You want the longest tread life
Pirelli Diablo Rosso IV scores 66 vs 63 on treadwear.
Tire A · Dunlop SportSmart TT
Tire B · Pirelli Diablo Rosso IV
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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.
Community buzz from Reddit and forums is shown for context only — it never changes the score.