77
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
75/100
10 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated May 2026
Bridgestone Battlax BT 021 vs Pirelli Diablo Rosso II — 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
80
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
82/100
19 owner reviews
Prices change daily — check the retailer for your size.
VerdictWinner: Pirelli Diablo Rosso II — better handling, comfort and dry. Pick the Bridgestone Battlax BT 021 if treadwear 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 II leads by 4
Why this score
| Source | Battlax BT 021 | Diablo Rosso II |
|---|---|---|
| Tyre Reviews owners | 86 | 90 |
Wet
Score (0–100)
Diablo Rosso II leads by 2
Why this score
| Source | Battlax BT 021 | Diablo Rosso II |
|---|---|---|
| Tyre Reviews owners | 71 | 73 |
Comfort
Score (0–100)
Diablo Rosso II leads by 7
Why this score
| Source | Battlax BT 021 | Diablo Rosso II |
|---|---|---|
| Tyre Reviews owners | 79 | 86 |
Treadwear
Score (0–100)
Battlax BT 021 leads by 4
Why this score
| Source | Battlax BT 021 | Diablo Rosso II |
|---|---|---|
| Tyre Reviews owners | 79 | 75 |
Handling
Score (0–100)
Diablo Rosso II leads by 10
Why this score
| Source | Battlax BT 021 | Diablo Rosso II |
|---|---|---|
| Tyre Reviews owners | 74 | 84 |
Scores at a glance
| Category | Bridgestone Battlax BT 021 | Pirelli Diablo Rosso II |
|---|---|---|
| Relative Score | 77 | 80 |
| Dry | 86 | 90 |
| Wet | 71 | 73 |
| Comfort | 79 | 86 |
| Treadwear | 79 | 75 |
| Handling | 74 | 84 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Recomputed
Headline score
77
/ 100
Tire A
80
/ 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 BT-021 receives a polarized reception, with user experience heavily dependent on riding style and tire pressure management. While some riders praise its longevity and consistent performance for commuting and touring, others report significant issues with handling, feedback, and wet-weather confidence.
Pros
- Exceptional tread longevity and durability for high-mileage commuters
- Reliable performance for motorway and long-distance riding
- Strong grip characteristics when tire pressures are correctly calibrated
- Confidence-inspiring stability for many sport-touring applications
Cons
- Handling characteristics can feel unpredictable or heavy if pressures are not perfectly matched to the bike
- Reports of poor wet-weather grip and lack of rider feedback
- Tendency for the center of the tire to flatten out significantly during high-mileage motorway use
- Inconsistent turn-in feel, described by some as fighting the rider
Observations
- Users noted that the tire is highly sensitive to manufacturer-recommended pressures, with incorrect settings leading to poor handling on bikes like the Kawasaki.
- Commuters on middleweight naked bikes reported high mileage but experienced uneven wear patterns, specifically flattening of the center tread.
The Pirelli Diablo Rosso II is widely regarded as a high-performance sport tire that excels in dry-weather grip, rapid warm-up times, and rider feedback. While it earns praise for its confidence-inspiring handling on sport bikes, user experiences regarding tread longevity and wet-weather performance are polarized, often depending heavily on bike weight and riding style.
Pros
- Exceptional dry-weather grip and cornering stability
- Rapid warm-up time for immediate performance
- Predictable handling and high levels of rider feedback
- Strong value proposition compared to premium competitors
Cons
- Inconsistent tread life, with reports of rapid center wear and cupping
- Polarized wet-weather performance ranging from 'glue-like' to 'dangerous'
- Tendency for the rear tire to square off over time
- Front tire profile can feel overly 'pointy' or aggressive for some riders
Observations
- Smaller displacement bikes (e.g., DRZ400SM, YZF-R25) report significantly higher mileage and longevity compared to high-horsepower sport bikes.
- High-horsepower motorcycles (e.g., ZX10R) experience rapid rear tire degradation, often requiring replacement in under 2,000 miles under spirited use.
- Some riders noted that the tire's profile on naked bikes can lead to overly quick turn-in characteristics.
Specifications
Specs side by side
| Attribute | A · Bridgestone Battlax BT 021 | B · Pirelli Diablo Rosso II |
|---|---|---|
| Category | Summer High Performance tires | Summer Max Performance tires |
| Vehicle type | Motorcycle | Motorcycle |
Final verdict
Which one should you actually buy?
77
/ 100
Bridgestone
80
/ 100
Pirelli
Winner: Pirelli Diablo Rosso II — better handling, comfort and dry. Pick the Bridgestone Battlax BT 021 if treadwear matters most to you.
Pick tire B
You enjoy sharp, responsive handling
Pirelli Diablo Rosso II scores 84 vs 74 on handling.
Pick tire B
You want the most comfortable ride
Pirelli Diablo Rosso II scores 86 vs 79 on comfort.
Pick tire A
You want the longest tread life
Bridgestone Battlax BT 021 scores 79 vs 75 on treadwear.
Pick tire B
You want the most grip on dry roads
Pirelli Diablo Rosso II scores 90 vs 86 on dry.
Tire A · Bridgestone Battlax BT 021
Tire B · Pirelli Diablo Rosso II
More comparisons
Also compared with
Bridgestone Battlax BT 021 also compared with
Pirelli Diablo Rosso II 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.