81
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
86/100
7 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated May 2026
Bridgestone Battlax Hypersport S21 vs Pirelli Diablo Rosso III — Compared (May 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
82
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
83/100
9 owner reviews
Prices change daily — check the retailer for your size.
VerdictToo close to call: Bridgestone Battlax Hypersport S21 and Pirelli Diablo Rosso III are within 2 points overall. Bridgestone Battlax Hypersport S21 is stronger on dry, handling and wet. Pirelli Diablo Rosso III is stronger on treadwear and comfort.
Read full
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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)
Battlax Hypersport S21 leads by 5
Why this score
| Source | Battlax Hypersport S21 | Diablo Rosso III |
|---|---|---|
| Tyre Reviews owners | 95 | 90 |
Wet
Score (0–100)
Battlax Hypersport S21 leads by 3
Why this score
| Source | Battlax Hypersport S21 | Diablo Rosso III |
|---|---|---|
| Tyre Reviews owners | 80 | 77 |
Comfort
Score (0–100)
Diablo Rosso III leads by 5
Why this score
| Source | Battlax Hypersport S21 | Diablo Rosso III |
|---|---|---|
| Tyre Reviews owners | 83 | 88 |
Treadwear
Score (0–100)
Diablo Rosso III leads by 12
Why this score
| Source | Battlax Hypersport S21 | Diablo Rosso III |
|---|---|---|
| Tyre Reviews owners | 63 | 75 |
Handling
Score (0–100)
Battlax Hypersport S21 leads by 5
Why this score
| Source | Battlax Hypersport S21 | Diablo Rosso III |
|---|---|---|
| Tyre Reviews owners | 95 | 90 |
Scores at a glance
| Category | Bridgestone Battlax Hypersport S21 | Pirelli Diablo Rosso III |
|---|---|---|
| Relative Score | 81 | 82 |
| Dry | 95 | 90 |
| Wet | 80 | 77 |
| Comfort | 83 | 88 |
| Treadwear | 63 | 75 |
| Handling | 95 | 90 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Recomputed
Headline score
81
/ 100
Tire A
82
/ 100
Tire B
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
The Bridgestone Battlax Hypersport S21 is widely regarded as a high-performance tire that excels in grip and handling, making it a favorite for aggressive street riding and occasional track use. While users praise its quick warm-up and confidence-inspiring cornering, the trade-off is a relatively short tread life, particularly for riders who spend significant time on straight roads.
Pros
- Exceptional dry grip and cornering stability
- Rapid warm-up time
- High performance capability suitable for track days
- Predictable and communicative road feel
Cons
- Limited tread longevity
- Rapid wear on the center compound during straight-line riding
- Reduced traction on painted road markings and pedestrian crossings
Observations
- Riders transitioning from 190/50 to 190/55 profiles on sportbikes like the Yamaha R1 report improved handling characteristics.
- The tire is specifically noted for its suitability on high-demand, high-horsepower sportbikes.
The Pirelli Diablo Rosso III is widely regarded as a high-performance sport tire that excels in providing predictable grip, excellent feedback, and confidence-inspiring wet-weather handling. While users consistently praise its agility and performance on twisty roads, there is a notable divide regarding tread longevity, with some riders experiencing rapid wear compared to more specialized track-focused or touring alternatives.
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
- High level of rider feedback and stability under heavy braking
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
Observations
- Sportbike riders (Ducati 959 Panigale, Yamaha R1) report high satisfaction with the tire's ability to handle aggressive cornering and track-day usage.
- Users transitioning from touring-oriented tires (e.g., Scorpion Trail) to the Rosso III note a significant increase in agility and cornering capability, though at the expense of touring longevity.
Specifications
Specs side by side
| Attribute | A · Bridgestone Battlax Hypersport S21 | B · Pirelli Diablo Rosso III |
|---|---|---|
| Category | Summer Extreme Performance tires | Summer Max Performance tires |
| Vehicle type | Motorcycle | Motorcycle |
Final verdict
Which one should you actually buy?
81
/ 100
Bridgestone
82
/ 100
Pirelli
Too close to call: Bridgestone Battlax Hypersport S21 and Pirelli Diablo Rosso III are within 2 points overall. Bridgestone Battlax Hypersport S21 is stronger on dry, handling and wet. Pirelli Diablo Rosso III is stronger on treadwear and comfort.
Pick tire B
You want the longest tread life
Pirelli Diablo Rosso III scores 75 vs 63 on treadwear.
Pick tire A
You want the most grip on dry roads
Bridgestone Battlax Hypersport S21 scores 95 vs 90 on dry.
Pick tire A
You enjoy sharp, responsive handling
Bridgestone Battlax Hypersport S21 scores 95 vs 90 on handling.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso III scores 88 vs 83 on comfort.
Tire A · Bridgestone Battlax Hypersport S21
Tire B · Pirelli Diablo Rosso III
More comparisons
Also compared with
Bridgestone Battlax Hypersport S21 also compared with
Pirelli Diablo Rosso III 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.