Tests 77 · 6 tests Owners 58 · 3 reviews
Best test result: #1 of 16 in 2021 Studless and Studded Winter Tyre Test (snow traction)
Head-to-head
Updated
Pirelli Ice Zero 2 vs Toyo Observe GSi-6 HP — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Observe GSi-6 HP leads, 71–67 Narrow edge
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Tests 69 · 2 tests Owners 75 · 14 reviews
Best test result: #5 of 20 in 2020 Nordic and Studded Winter Tyre Test (dry braking)
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
72
Dry
Observe GSi-6 HP +375Why this score
Source Ice Zero 2 Observe GSi-6 HP Professional tests (TWG score) 81 73 Reviews found online 58 79 Dry Braking (% of best) 97% 97% -
73
Wet
Observe GSi-6 HP +275Why this score
Source Ice Zero 2 Observe GSi-6 HP Professional tests (TWG score) 80 71 Reviews found online 61 81 Wet Braking (% of best) 86% 81% Wet Handling (% of best) 100% 97% -
71
Snow
Ice Zero 2 +566Why this score
Source Ice Zero 2 Observe GSi-6 HP Professional tests (TWG score) 75 60 Reviews found online 64 75 Snow Braking (% of best) 99% 99% Snow Handling (% of best) 99% 98% Snow Traction (% of best) 100% 95% -
63
Comfort
Observe GSi-6 HP +1477Why this score
Source Ice Zero 2 Observe GSi-6 HP Professional tests (TWG score) 72 77 Reviews found online 50 77 -
66
Noise
Observe GSi-6 HP +470Why this score
Source Ice Zero 2 Observe GSi-6 HP Professional tests (TWG score) 65 72 -
58
Treadwear
Observe GSi-6 HP +765Why this score
Source Ice Zero 2 Observe GSi-6 HP Reviews found online 52 65 -
56
Handling
Observe GSi-6 HP +2177Why this score
Source Ice Zero 2 Observe GSi-6 HP Reviews found online 56 77
Scores at a glance
| Category | Pirelli Ice Zero 2 | Toyo Observe GSi-6 HP |
|---|---|---|
| Relative Score | 67 | 71 |
| Dry | 72 | 75 |
| Wet | 73 | 75 |
| Snow | 71 | 66 |
| Comfort | 63 | 77 |
| Noise | 66 | 70 |
| Treadwear | 58 | 65 |
| Handling | 56 | 77 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Recomputed
Headline score
67
/ 100
Ice Zero 2
71
/ 100
Observe GSi-6 HP
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 | Ice Zero 2 | Observe GSi-6 HP | Δ | Both? |
|---|---|---|---|---|---|
| Dry Braking | Dry | 97% #9/14 · 2025 Friction and Studded Winter Tyre Test | 97% #5/20 · 2020 Nordic and Studded Winter Tyre Test | +0.2 | Different tests |
| Fuel Consumption | Fuel | 99% #4/8 · 2020 Studded Winter Tyre Test | 96% #10/20 · 2025 Studded, Friction and European Winter Tyre Test | +2.9 | Different tests |
| Ice Braking | Ice | 78% #13/14 · 2025 Friction and Studded Winter Tyre Test | 79% #18/20 · 2020 Nordic and Studded Winter Tyre Test | −0.8 | Different tests |
| Ice Handling | Ice | 86% #9/16 · 2021 Studless and Studded Winter Tyre Test | 85% #18/20 · 2020 Nordic and Studded Winter Tyre Test | +1.1 | Different tests |
| Ice Traction | Ice | 71% #13/14 · 2025 Friction and Studded Winter Tyre Test | 57% #18/20 · 2020 Nordic and Studded Winter Tyre Test | +13.8 | Different tests |
| Overall Ranking | Overall | 50% #2/17 · The Best Studded / Friction Winter Tyres for 2024 | 8% #12/20 · 2025 Studded, Friction and European Winter Tyre Test | +41.7 | Different tests |
| Snow Braking | Snow | 99% #9/14 · 2025 Friction and Studded Winter Tyre Test | 99% #8/20 · 2020 Nordic and Studded Winter Tyre Test | +0.6 | Different tests |
| Snow Handling | Snow | 99% #6/8 · 2020 Studded Winter Tyre Test | 98% #12/20 · 2020 Nordic and Studded Winter Tyre Test | +0.5 | Different tests |
| Snow Traction | Snow | 100% #1/16 · 2021 Studless and Studded Winter Tyre Test | 95% #16/20 · 2020 Nordic and Studded Winter Tyre Test | +4.8 | Different tests |
| Straight Aqua | Straight | 87% #6/20 · 2025 Studded, Friction and European Winter Tyre Test | 83% #9/20 · 2025 Studded, Friction and European Winter Tyre Test | +3.9 | Same test |
| Subj. Comfort | Subj | 60% #12/20 · 2025 Studded, Friction and European Winter Tyre Test | 80% #6/20 · 2025 Studded, Friction and European Winter Tyre Test | −20.0 | Same test |
| Subj. Ice Handling | Subj | 60% #17/18 · 2026 Teknikens Värld Studded, Nordic and Central European Winter Tyre Test | 40% #15/20 · 2025 Studded, Friction and European Winter Tyre Test | +20.0 | Different tests |
| Subj. Noise | Subj | 70% #9/14 · 2025 Friction and Studded Winter Tyre Test | 89% #10/20 · 2020 Nordic and Studded Winter Tyre Test | −18.9 | Different tests |
| Subj. Snow Handling | Subj | 90% #16/18 · 2026 Teknikens Värld Studded, Nordic and Central European Winter Tyre Test | 70% #13/20 · 2025 Studded, Friction and European Winter Tyre Test | +20.0 | Different tests |
| Subj. Wet Handling | Subj | 70% #12/18 · 2026 Teknikens Värld Studded, Nordic and Central European Winter Tyre Test | 60% #6/20 · 2025 Studded, Friction and European Winter Tyre Test | +10.0 | Different tests |
| Wet Braking | Wet | 86% #4/16 · 2021 Studless and Studded Winter Tyre Test | 81% #7/20 · 2020 Nordic and Studded Winter Tyre Test | +4.9 | Different tests |
| Wet Handling | Wet | 100% #1/8 · 2026 Vi Bilagare Studded Tyre Test | 97% #8/20 · 2020 Nordic and Studded Winter Tyre Test | +3.2 | Different tests |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Ice Zero 2
Pros
- Very good traction and performance on snow
- Reasonably quiet for a studded winter tire
- Adequate performance on wet and salty roads
Cons
- Dangerous slipping on ice at low speeds in cold climates
- Strong, intrusive howling noise at speeds above 95 km/h
- Poor overall handling compared to competing studded winter tires like the Nokian Hakkapeliitta
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 Ice Zero 2 | B · Toyo Observe GSi-6 HP |
|---|---|---|
| Category | Winter | Winter |
| Vehicle type | Passenger Car / Crossover | — |
| Sizes available | — | 39 |
| Rim diameters | — | 16″ – 21″ |
| Tread depth | — | 11 - 12/32″ |
| Sidewall | — | Black Side Wall |
| Max pressure | — | 50 - 51 psi |
Which one should you actually buy?
67
/ 100
Pirelli Ice Zero 2
71
/ 100
Toyo Observe GSi-6 HP
Winner: Toyo Observe GSi-6 HP — better handling, comfort and treadwear. Pick the Pirelli Ice Zero 2 if snow matters most to you.
Pick tire B
You enjoy sharp, responsive handling
Toyo Observe GSi-6 HP scores 77 vs 56 on handling.
Pick tire B
You want the most comfortable ride
Toyo Observe GSi-6 HP scores 77 vs 63 on comfort.
Pick tire B
You want the longest tread life
Toyo Observe GSi-6 HP scores 65 vs 58 on treadwear.
Pick tire A
You drive through snowy winters
Pirelli Ice Zero 2 scores 71 vs 66 on snow.
Tire A · Pirelli Ice Zero 2
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.