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Head-to-head Updated

Goodyear UltraGrip 8 vs Toyo Observe GSi-6 HP — 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 0 + 2 road tests and 59 + 14 owner reviews. How we score

UltraGrip 8 is ahead, 79–71

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Toyo Observe GSi-6 HP
Tire BToyo

Observe GSi-6 HP

Winter

± 6

Tests 69 · 2 tests Owners 73 · 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.

  1. 78

    Dry

    UltraGrip 8 +3
    75
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 1 tests≈ 74 (est.)73
    Reviews found online8377

    UltraGrip 8: 60% × 74.1 (est.) + 40% × 82.9 = 78

    Observe GSi-6 HP: 60% × 73 + 40% × 76.9 = 75

    No road tests of dry for UltraGrip 8. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 85

    Wet

    UltraGrip 8 +10
    75
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 2 tests≈ 81 (est.)71
    Reviews found online9081

    UltraGrip 8: 60% × 81.2 (est.) + 40% × 89.9 = 85

    Observe GSi-6 HP: 60% × 71.5 + 40% × 80.8 = 75

    No road tests of wet for UltraGrip 8. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 75

    Snow

    UltraGrip 8 +9
    66
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 2 tests≈ 73 (est.)60
    Reviews found online7875

    UltraGrip 8: 60% × 72.8 (est.) + 40% × 77.8 = 75

    Observe GSi-6 HP: 60% × 59.5 + 40% × 74.7 = 66

    No road tests of snow for UltraGrip 8. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 78

    Comfort

    UltraGrip 8 +3
    75
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 1 tests≈ 71 (est.)77
    Reviews found online8274

    UltraGrip 8: 40% × 71.3 (est.) + 60% × 81.9 = 78

    Observe GSi-6 HP: 40% × 76.7 + 60% × 73.9 = 75

    No road tests of comfort for UltraGrip 8. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. –

    Noise

    No comparison
    70
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–72
    Reviews found online–≈ 66 (est.)

    Observe GSi-6 HP: 60% × 71.6 + 40% × 66.4 (est.) = 70

    No owner ratings of noise for Observe GSi-6 HP. The owner half is the owners’ average (66): owners’ noise ratings barely follow the road tests, so the tests say nothing about how owners would rate it.

  6. 75

    Treadwear

    UltraGrip 8 +13
    62
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score)≈ 72 (est.)≈ 64 (est.)
    Reviews found online8159

    UltraGrip 8: 60% × 71.8 (est.) + 40% × 81 = 75

    Observe GSi-6 HP: 60% × 63.6 (est.) + 40% × 58.5 = 62

    No road tests of treadwear for UltraGrip 8. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

    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 0.36).

  7. 83

    Handling (owners)

    UltraGrip 8 +8
    75
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Reviews found online8375
  8. –

    Efficiency

    No comparison
    66
    Why this score
    SourceUltraGrip 8Observe GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–66
Scores at a glance
CategoryGoodyear UltraGrip 8Toyo Observe GSi-6 HP
Relative Score 79 71
Dry 78 75
Wet 85 75
Snow 75 66
Comfort 78 75
Noise – 70
Treadwear 75 62
Handling (owners) 83 75
Efficiency – 66

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

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Not important
NotLessNeutralImportantMost

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Recomputed
Headline score
± 8

UltraGrip 8

± 6

Observe GSi-6 HP

Only categories both tires have data for count toward the headline score.

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.

DisciplineCategoryUltraGrip 8Observe GSi-6 HPΔHead-to-head
Also published by the testers (not in the score)
Overall Ranking Overall #6/9 2013 ACE Winter Tyre Test #12/20 2025 Studded, Friction and European Winter Tyre Test – Different tests

Pros, cons & observations

Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.

Tire A UltraGrip 8

Pros

  • Exceptional grip and traction in wet, slushy, and snowy conditions
  • High level of ride comfort and refinement
  • Low road noise compared to many winter tire competitors

Cons

  • Reports of excessive road noise for some specific vehicle applications
  • Tread wear can be faster than average under heavy usage or high-speed driving
  • Occasional reports of 'snappy' handling characteristics when pushed to the absolute limit
All owner themes in the UltraGrip 8 review

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
All owner themes in the Observe GSi-6 HP review

Specs side by side

Attribute A · Goodyear UltraGrip 8 B · Toyo Observe GSi-6 HP
CategoryWinterWinter
Vehicle typePassenger Car / Crossover—
Sizes available1439
Rim diameters13″ – 16″16″ – 21″
Tread depth—11 - 12/32″
Sidewall—Black Side Wall
Max pressure—50 - 51 psi
Sizes in common22

Which one should you actually buy?

Goodyear UltraGrip 8

Toyo Observe GSi-6 HP

Winner: Goodyear UltraGrip 8 — better treadwear, wet and snow. It leads or ties in every category we score.

Pick tire A You want the longest tread life

Goodyear UltraGrip 8 scores 75 vs 62 on treadwear.

Pick tire A Your priority is wet-weather safety

Goodyear UltraGrip 8 scores 85 vs 75 on wet.

Pick tire A You drive through snowy winters

Goodyear UltraGrip 8 scores 75 vs 66 on snow.

Pick tire A You enjoy sharp, responsive handling

Goodyear UltraGrip 8 scores 83 vs 75 on handling.

Tire A · Goodyear UltraGrip 8
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Tire B · Toyo Observe GSi-6 HP
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UltraGrip 8 or Observe GSi-6 HP?

Which is better in the wet, UltraGrip 8 or Observe GSi-6 HP?

Goodyear UltraGrip 8, 85 vs 75 on our wet score.

Which grips better on dry roads, UltraGrip 8 or Observe GSi-6 HP?

Goodyear UltraGrip 8, 78 vs 75 on our dry score.

Which is better in snow, UltraGrip 8 or Observe GSi-6 HP?

Goodyear UltraGrip 8, 75 vs 66 on our snow score.

Which is more comfortable, UltraGrip 8 or Observe GSi-6 HP?

Goodyear UltraGrip 8, 78 vs 75 on our comfort score.

Which lasts longer, UltraGrip 8 or Observe GSi-6 HP?

Goodyear UltraGrip 8, 75 vs 62 on our treadwear 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