85
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
85/100
13 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated September 2026
Dunlop Roadsmart vs Pirelli Diablo Rosso IV — Compared (September 2026)
Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.
VS
81
/ 100
Objective (60%)
70/100
1 professional test
User signal (40%)
87/100
7 owner reviews
Prices change daily — check the retailer for your size.
VerdictWinner: Dunlop Roadsmart — better wet and treadwear. Pick the Pirelli Diablo Rosso IV if handling matters most to you.
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Category breakdown
5 categories, side by side
Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
Dry
Score (0–100)
Diablo Rosso IV leads by 1
Why this score
| Source | Roadsmart | Diablo Rosso IV |
|---|---|---|
| Professional tests (TWG score) | – | 87 |
| Tyre Reviews owners | 88 | 93 |
Wet
Score (0–100)
Roadsmart leads by 13
Why this score
| Source | Roadsmart | Diablo Rosso IV |
|---|---|---|
| Professional tests (TWG score) | – | 67 |
| Tyre Reviews owners | 85 | 79 |
Comfort
Score (0–100)
Roadsmart leads by 2
Why this score
| Source | Roadsmart | Diablo Rosso IV |
|---|---|---|
| Tyre Reviews owners | 88 | 86 |
Treadwear
Score (0–100)
Roadsmart leads by 6
Why this score
| Source | Roadsmart | Diablo Rosso IV |
|---|---|---|
| Tyre Reviews owners | 82 | 76 |
Handling
Score (0–100)
Diablo Rosso IV leads by 6
Why this score
| Source | Roadsmart | Diablo Rosso IV |
|---|---|---|
| Tyre Reviews owners | 85 | 91 |
| DriverReviews owners | – | 92 |
Scores at a glance
| Category | Dunlop Roadsmart | Pirelli Diablo Rosso IV |
|---|---|---|
| Relative Score | 85 | 81 |
| Dry | 88 | 89 |
| Wet | 85 | 72 |
| Comfort | 88 | 86 |
| Treadwear | 82 | 76 |
| Handling | 85 | 91 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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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
85
/ 100
Tire A
81
/ 100
Tire B
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
The Dunlop Roadsmart is highly regarded as a reliable, confidence-inspiring sport-touring tire that balances neutral handling with impressive wet and dry grip. While some users report uneven wear patterns or squaring off over time, the consensus highlights its significant performance improvements over older tire generations and its ability to maintain stability across varied riding conditions.
Pros
- Excellent grip in both wet and dry conditions
- Neutral and predictable steering characteristics
- High level of rider confidence during cornering
- Strong performance even when tires are cold
- Good longevity for a sport-touring compound
Cons
- Tendency for the rear tire to square off with mileage
- Soft shoulder rubber may wear faster than the center
- Occasional reports of rear wheel slippage in wet conditions for some riders
- Less dry-grip feedback compared to dedicated sport-focused tires
Observations
- High-torque bikes like the Aprilia Tuono 1000 and Suzuki Hayabusa demonstrate that the tire holds up well under aggressive, high-performance riding.
- Users transitioning from older sport-touring models (e.g., BT-020) report a transformative improvement in handling and confidence.
The Pirelli Diablo Rosso IV is widely regarded as a top-tier hypersport tire that offers significant improvements in feedback, warm-up time, and lean-angle confidence over its predecessors. While users consistently praise its performance in both wet and dry conditions, the consensus notes that these gains come at a premium price point and with potential longevity trade-offs depending on riding style.
Pros
- Exceptional dry and wet grip with rapid warm-up times.
- High level of precision and confidence at deep lean angles.
- Improved feedback and stability compared to previous generations (DR2/DR3).
- Surprisingly good low-speed stability and handling characteristics.
Cons
- Higher price point compared to competitors and previous models.
- Performance consistency may degrade as the tire reaches the end of its service life.
- Potential for increased wear rates under aggressive riding conditions.
Observations
- Users reported significant improvements in resistance to cupping on smaller displacement bikes (e.g., PCX 125) compared to the Diablo Rosso II.
- Aggressive riders utilizing standard sportbike sizes (120/70 and 190/55) report that the tire maintains performance characteristics comparable to more track-focused compounds like the Rosso Corsa II.
Specifications
Specs side by side
| Attribute | A · Dunlop Roadsmart | B · Pirelli Diablo Rosso IV |
|---|---|---|
| Category | Summer Premium Touring tires | Summer Max Performance tires |
| Vehicle type | Motorcycle | Motorcycle |
Final verdict
Which one should you actually buy?
85
/ 100
Dunlop
81
/ 100
Pirelli
Winner: Dunlop Roadsmart — better wet and treadwear. Pick the Pirelli Diablo Rosso IV if handling matters most to you.
Pick tire A
Your priority is wet-weather safety
Dunlop Roadsmart scores 85 vs 72 on wet.
Pick tire A
You want the longest tread life
Dunlop Roadsmart scores 82 vs 76 on treadwear.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso IV scores 91 vs 85 on handling.
Tire A · Dunlop Roadsmart
Tire B · Pirelli Diablo Rosso IV
More comparisons
Also compared with
Dunlop Roadsmart also compared with
Pirelli Diablo Rosso IV also compared with
How do we compare tires?
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.
Community buzz from Reddit and forums is shown for context only — it never changes the score.