Tests – · none yet Owners 70 · 15 reviews
Head-to-head
Updated
Pirelli P ZERO Asimmetrico vs Toyo Observe GSi-6 HP — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Observe GSi-6 HP leads, 73–70 Narrow edge
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Tests 69 · 2 tests Owners 75 · 14 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
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70
Dry
Observe GSi-6 HP +575Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Professional tests (TWG score) – 73 Reviews found online 72 79 -
72
Wet
Observe GSi-6 HP +375Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Professional tests (TWG score) – 71 Reviews found online 73 81 -
–
Snow
No comparison66Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Professional tests (TWG score) – 60 Reviews found online – 75 -
67
Comfort
Observe GSi-6 HP +1077Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Professional tests (TWG score) – 77 Reviews found online 65 77 -
–
Noise
No comparison70Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Professional tests (TWG score) – 72 -
67
Treadwear
P ZERO Asimmetrico +265Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Reviews found online 67 65 -
70
Handling
Observe GSi-6 HP +777Why this score
Source P ZERO Asimmetrico Observe GSi-6 HP Reviews found online 70 77
Scores at a glance
| Category | Pirelli P ZERO Asimmetrico | Toyo Observe GSi-6 HP |
|---|---|---|
| Relative Score | 70 | 73 |
| Dry | 70 | 75 |
| Wet | 72 | 75 |
| Snow | – | 66 |
| Comfort | 67 | 77 |
| Noise | – | 70 |
| Treadwear | 67 | 65 |
| Handling | 70 | 77 |
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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Neutral
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Neither tire has a score here yet, so this weight changes nothing.
Less important
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Less important
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Neither tire has a score here yet, so this weight changes nothing.
Important
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Neutral
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Recomputed
Headline score
70
/ 100
P ZERO Asimmetrico
73
/ 100
Observe GSi-6 HP
Only categories both tires have data for count toward the headline score.
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A P ZERO Asimmetrico
Pros
- Exceptional tread life and longevity, with multiple users reporting upwards of 35,000 to 43,000 miles
- Strong dry grip and excellent road feel when fresh
- Reliable and competent performance in wet conditions at moderate speeds
Cons
- Significant increase in road noise as the tire ages, often resembling failing wheel bearings
- Prone to uneven wear and tracking road imperfections
- Reduced wet traction and potential for wheel spin when pushed before building heat
Tire B Observe GSi-6 HP
Pros
- Exceptional traction and stability in snow and slush
- Impressive wet-weather performance and hydroplaning resistance
- Remarkably quiet ride quality for a winter tire
Cons
- Inconsistent tread life reports, with some users experiencing premature wear
- Occasional reports of structural failure or tread separation
- Slightly vague steering feel at lower speeds
Specs side by side
| Attribute | A · Pirelli P ZERO Asimmetrico | B · Toyo Observe GSi-6 HP |
|---|---|---|
| Category | Summer | Winter |
| Vehicle type | Passenger Car / Crossover | — |
| Sizes available | 17 | 39 |
| Rim diameters | 17″ – 19″ | 16″ – 21″ |
| Tread depth | — | 11 - 12/32″ |
| Sidewall | — | Black Side Wall |
| Max pressure | — | 50 - 51 psi |
Which one should you actually buy?
70
/ 100
Pirelli P ZERO Asimmetrico
73
/ 100
Toyo Observe GSi-6 HP
Winner: Toyo Observe GSi-6 HP — better comfort, handling and dry. It leads or ties in every category we score.
Pick tire B
You want the most comfortable ride
Toyo Observe GSi-6 HP scores 77 vs 67 on comfort.
Pick tire B
You enjoy sharp, responsive handling
Toyo Observe GSi-6 HP scores 77 vs 70 on handling.
Pick tire B
You want the most grip on dry roads
Toyo Observe GSi-6 HP scores 75 vs 70 on dry.
Pick tire B
Your priority is wet-weather safety
Toyo Observe GSi-6 HP scores 75 vs 72 on wet.
Tire A · Pirelli P ZERO Asimmetrico
Tire B · Toyo Observe GSi-6 HP
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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.