Tests – · none yet Owners 61 · 4 reviews
Best test result: #5 of 7 in 2014 Motorrad Premium Touring Motorcycle Tyre Test (overall ranking)
Head-to-head
Updated
Dunlop RoadSmart II vs Pirelli Diablo Rosso IV — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Diablo Rosso IV is ahead, 76–63
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Tests 74 · 1 test Owners 79 · 177 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.
-
63
Dry
Diablo Rosso IV +1376Why this score
Source RoadSmart II Diablo Rosso IV Professional tests (TWG score) – 68 Reviews found online 60 87 -
61
Wet
Diablo Rosso IV +1879Why this score
Source RoadSmart II Diablo Rosso IV Professional tests (TWG score) – 79 Reviews found online 58 80 -
65
Comfort
Diablo Rosso IV +1075Why this score
Source RoadSmart II Diablo Rosso IV Reviews found online 61 81 -
64
Treadwear
Diablo Rosso IV +266Why this score
Source RoadSmart II Diablo Rosso IV Reviews found online 63 66 -
64
Handling
Diablo Rosso IV +2387Why this score
Source RoadSmart II Diablo Rosso IV Reviews found online 64 87
Scores at a glance
| Category | Dunlop RoadSmart II | Pirelli Diablo Rosso IV |
|---|---|---|
| Relative Score | 63 | 76 |
| Dry | 63 | 76 |
| Wet | 61 | 79 |
| Comfort | 65 | 75 |
| Treadwear | 64 | 66 |
| Handling | 64 | 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
63
/ 100
RoadSmart II
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 | RoadSmart II | Diablo Rosso IV | Δ | Both? |
|---|---|---|---|---|---|
| Overall Ranking | Overall | 20% #5/7 · 2014 Motorrad Premium Touring Motorcycle Tyre Test | 20% #5/12 · 2025 Sport and Hypersport Motorcycle Tyre Test | 0.0 | Different tests |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A RoadSmart II
Pros
- High levels of dry and wet grip for sport-touring applications
- Excellent steering precision and rider feedback
- Inspires confidence in varied riding conditions for satisfied users
Cons
- Reported lack of rear tire traction during aggressive cornering
- Inconsistent performance leading to safety concerns in wet weather
- Perceived inferiority compared to competing sport-touring brands
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 RoadSmart II | B · Pirelli Diablo Rosso IV |
|---|---|---|
| Category | Summer Premium Touring tires | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
63
/ 100
Dunlop RoadSmart II
76
/ 100
Pirelli Diablo Rosso IV
Winner: Pirelli Diablo Rosso IV — better handling, wet and dry. It leads or ties in every category we score.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 87 vs 64 on handling.
Pick tire B
Your priority is wet-weather safety
Pirelli Diablo Rosso IV scores 79 vs 61 on wet.
Pick tire B
You want the most grip on dry roads
Pirelli Diablo Rosso IV scores 76 vs 63 on dry.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso IV scores 75 vs 65 on comfort.
Tire A · Dunlop RoadSmart II
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.