Tests 69 · 2 tests Owners 73 · 14 reviews
Best test result: #5 of 20 in 2020 Nordic and Studded Winter Tyre Test (dry braking)
Head-to-head
Updated
Toyo Observe GSi-6 HP vs Hankook Winter I cept iZ2 W616 — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews (comfort 40/60). Based on 2 + 5 road tests and 14 + 37 owner reviews. How we score
Observe GSi-6 HP is ahead, 71–65
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Tests 65 · 5 tests Owners 64 · 37 reviews
Best test result: #1 of 17 in 2023 UTAC Large Winter Tire Test R16 (exterior noise)
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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75
Dry
Observe GSi-6 HP +867Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 1 / 5 tests 73 71 Reviews found online 77 60 Dry Braking (% of best) · 1 shared test · wins 1–0 97% 96% Observe GSi-6 HP: 60% × 73 + 40% × 77.4 = 75
Winter I cept iZ2 W616: 60% × 71.3 + 40% × 60.2 = 67
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75
Wet
Observe GSi-6 HP +1263Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 2 / 5 tests 71 59 Reviews found online 81 67 Wet Braking (% of best) · 1 shared test · wins 1–0 81% 77% Wet Handling (% of best) · 1 shared test · wins 0–1 97% 98% Observe GSi-6 HP: 60% × 71.2 + 40% × 81 = 75
Winter I cept iZ2 W616: 60% × 59.5 + 40% × 67.1 = 63
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66
Snow
Winter I cept iZ2 W616 +167Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 2 / 5 tests 60 58 Reviews found online 75 79 Ice Braking (% of best) · 1 shared test · wins 0–1 79% 87% Ice Handling (% of best) · 1 shared test · wins 0–1 85% 90% Ice Traction (% of best) · 1 shared test · wins 0–1 57% 63% Snow Braking (% of best) · 1 shared test · wins 1–0 99% 98% Snow Handling (% of best) · 1 shared test · wins 0–1 98% 98% Snow Traction (% of best) · 1 shared test · wins 0–1 95% 97% Observe GSi-6 HP: 60% × 59.7 + 40% × 75.2 = 66
Winter I cept iZ2 W616: 60% × 58.1 + 40% × 79.1 = 67
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76
Comfort
Observe GSi-6 HP +1066Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 1 / – tests 78 ≈ 68 (est.) Reviews found online 75 64 Observe GSi-6 HP: 40% × 77.5 + 60% × 74.5 = 76
Winter I cept iZ2 W616: 40% × 68.2 (est.) + 60% × 64.2 = 66
No road tests of comfort for Winter I cept iZ2 W616. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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70
Noise
Winter I cept iZ2 W616 +171Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 1 / 4 tests 72 83 Reviews found online ≈ 67 (est.) 53 Noise (tester's mark) (% of best) · 1 shared test · wins 0–0 89% 89% Observe GSi-6 HP: 60% × 71.7 + 40% × 66.6 (est.) = 70
Winter I cept iZ2 W616: 60% × 82.8 + 40% × 52.8 = 71
No owner ratings of noise for Observe GSi-6 HP. The owner half is the owners’ average (67): owners’ noise ratings barely follow the road tests, so the tests say nothing about how owners would rate it.
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61
Treadwear
Observe GSi-6 HP +259Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) ≈ 63 (est.) ≈ 62 (est.) Reviews found online 58 54 Observe GSi-6 HP: 60% × 63.3 (est.) + 40% × 58.2 = 61
Winter I cept iZ2 W616: 60% × 61.9 (est.) + 40% × 54 = 59
No road tests of treadwear for Observe GSi-6 HP. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).
No road tests of treadwear for Winter I cept iZ2 W616. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).
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76
Handling (owners)
Observe GSi-6 HP +967Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Reviews found online 76 67 -
66
Efficiency
Winter I cept iZ2 W616 +1076Why this score
Source Observe GSi-6 HP Winter I cept iZ2 W616 Professional tests (TWG score) · 1 / 3 tests 66 76
Scores at a glance
| Category | Toyo Observe GSi-6 HP | Hankook Winter I cept iZ2 W616 |
|---|---|---|
| Relative Score | 71 | 65 |
| Dry | 75 | 67 |
| Wet | 75 | 63 |
| Snow | 66 | 67 |
| Comfort | 76 | 66 |
| Noise | 70 | 71 |
| Treadwear | 61 | 59 |
| Handling (owners) | 76 | 67 |
| Efficiency | 66 | 76 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip starts at “Important”. Treadwear starts at “Neutral” here: road tests measured it for at most one of the two tires, so it rests on owner reviews. Move the sliders and the scores update instantly.
Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Not important
NotLessNeutralImportantMost
Recomputed
Headline score
71
/ 100
Observe GSi-6 HP
65
/ 100
Winter I cept iZ2 W616
The professional test results behind the scores
Per discipline: the average % of the best tire over every test both tires were in, and how many of those tests each one won. “Different tests” rows compare results from separate tests.
In the overall rankings of 1 tests that ran both, Toyo Observe GSi-6 HP finished ahead 0 times and Hankook Winter I cept iZ2 W616 1 times.
| Discipline | Category | Observe GSi-6 HP | Winter I cept iZ2 W616 | Δ | Head-to-head |
|---|---|---|---|---|---|
| Dry Braking | Dry | 97% | 96% | +1.6 | 1–0 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Straight Aquaplaning | Wet | 83% #9/20 · 2025 Studded, Friction and European Winter Tyre Test | 73% #4/7 · 2025 NAF Motor Studless Winter Tire Test R17 | – | Different tests |
| Wet Braking | Wet | 81% | 77% | +4.0 | 1–0 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Wet Handling | Wet | 97% | 98% | −0.9 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Wet Handling (tester's mark) | Wet | 60% #6/20 · 2025 Studded, Friction and European Winter Tyre Test | 80% #3/7 · 2025 NAF Motor Studless Winter Tire Test R17 | – | Different tests |
| Ice Braking | Snow | 79% | 87% | −8.3 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Ice Handling | Snow | 85% | 90% | −4.4 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Ice Traction | Snow | 57% | 63% | −5.8 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Snow Braking | Snow | 99% | 98% | +0.6 | 1–0 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Snow Handling | Snow | 98% | 98% | −0.4 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Snow Traction | Snow | 95% | 97% | −1.5 | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Noise (tester's mark) | Noise | 89% | 89% | 0.0 | 0–0 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
| Fuel Consumption | Efficiency | 96% #10/20 · 2025 Studded, Friction and European Winter Tyre Test | 97% #4/8 · 2024 Nordic Friction Winter Tyre Test | – | Different tests |
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #19/20 | #12/20 | – | 0–1 in 1 shared test Newest: 2020 Nordic and Studded Winter Tyre Test · 205/55 R16 |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A 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
Tire B Winter I cept iZ2 W616
Pros
- Exceptional grip and traction in deep snow, slush, and severe winter conditions
- Low road noise, offering a much quieter ride than typical winter tires
- High comfort levels and stable, predictable handling on cold dry or wet roads
Cons
- Subpar performance or reduced traction on wet roads and heavy rain
- Faster tread wear, particularly during aggressive driving or when used in warmer weather
- Softer sidewalls can feel slightly edgy or less precise when pushed to the limit
Specs side by side
| Attribute | A · Toyo Observe GSi-6 HP | B · Hankook Winter I cept iZ2 W616 |
|---|---|---|
| Category | Winter | Winter |
| Vehicle type | — | Passenger Car / Crossover |
| Sizes available | 39 | 2 |
| Rim diameters | 16″ – 21″ | 16″ – 18″ |
| Tread depth | 11 - 12/32″ | 10.5/32″ |
| Treadwear warranty | — | 40,000 mi |
| Sidewall | Black Side Wall | Blackwall |
| Max pressure | 50 - 51 psi | 50 psi |
Which one should you actually buy?
71
/ 100
Toyo Observe GSi-6 HP
65
/ 100
Hankook Winter I cept iZ2 W616
Winner: Toyo Observe GSi-6 HP — better wet, comfort and handling. Pick the Hankook Winter I cept iZ2 W616 if efficiency matters most to you.
Pick tire A
Your priority is wet-weather safety
Toyo Observe GSi-6 HP scores 75 vs 63 on wet.
Pick tire A
You want the most comfortable ride
Toyo Observe GSi-6 HP scores 76 vs 66 on comfort.
Pick tire B
You want lower fuel or energy use
Hankook Winter I cept iZ2 W616 scores 76 vs 66 on efficiency.
Pick tire A
You enjoy sharp, responsive handling
Toyo Observe GSi-6 HP scores 76 vs 67 on handling.
Tire A · Toyo Observe GSi-6 HP
Tire B · Hankook Winter I cept iZ2 W616
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Observe GSi-6 HP or Winter I cept iZ2 W616?
Which is better in the wet, Observe GSi-6 HP or Winter I cept iZ2 W616?
Toyo Observe GSi-6 HP, 75 vs 63 on our wet score.
Which grips better on dry roads, Observe GSi-6 HP or Winter I cept iZ2 W616?
Toyo Observe GSi-6 HP, 75 vs 67 on our dry score.
Which is better in snow, Observe GSi-6 HP or Winter I cept iZ2 W616?
Neither, by our numbers: 66 vs 67 on the snow score, within 3 points.
Which is quieter, Observe GSi-6 HP or Winter I cept iZ2 W616?
Neither, by our numbers: 70 vs 71 on the noise score, within 3 points.
Which is more comfortable, Observe GSi-6 HP or Winter I cept iZ2 W616?
Toyo Observe GSi-6 HP, 76 vs 66 on our comfort score.
Which lasts longer, Observe GSi-6 HP or Winter I cept iZ2 W616?
Neither, by our numbers: 61 vs 59 on the treadwear score, within 3 points.
Which rolls more easily, Observe GSi-6 HP or Winter I cept iZ2 W616?
Hankook Winter I cept iZ2 W616, 76 vs 66 on our efficiency score.
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.
Handling is the exception: road tests measure it inside the dry and wet scores, so its own row comes from owner ratings only and starts as less important.
Community buzz from Reddit and forums is shown for context only — it never changes the score. Full methodology