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Yokohama iceGUARD iG51v looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Yokohama iceGUARD iG51v 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 11 + 14 owner reviews. How we score

Too close to call: iceGUARD iG51v and Observe GSi-6 HP are level at 71.

Check price on Amazon · iceGUARD iG51v Check price on Amazon · Observe GSi-6 HP
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Yokohama iceGUARD iG51v
Tire AYokohama

iceGUARD iG51v

Premium Touring Winter tire

± 8Provisional

Tests – · none yet Owners 69 · 11 reviews

Toyo Observe GSi-6 HP
Tire BToyo

Observe GSi-6 HP

Winter

± 7

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. 71

    Dry

    Observe GSi-6 HP +4
    75
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests≈ 70 (est.)73
    Reviews found online7277

    iceGUARD iG51v: 60% × 69.7 (est.) + 40% × 71.8 = 71

    Observe GSi-6 HP: 60% × 73 + 40% × 77.4 = 75

    No road tests of dry for iceGUARD iG51v. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 78

    Wet

    iceGUARD iG51v +3
    75
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 2 tests≈ 76 (est.)71
    Reviews found online8081

    iceGUARD iG51v: 60% × 75.9 (est.) + 40% × 80 = 78

    Observe GSi-6 HP: 60% × 71.2 + 40% × 81 = 75

    No road tests of wet for iceGUARD iG51v. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 74

    Snow

    iceGUARD iG51v +8
    66
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 2 tests≈ 73 (est.)60
    Reviews found online7675

    iceGUARD iG51v: 60% × 72.9 (est.) + 40% × 76.4 = 74

    Observe GSi-6 HP: 60% × 59.7 + 40% × 75.2 = 66

    No road tests of snow for iceGUARD iG51v. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).

  4. 70

    Comfort

    Observe GSi-6 HP +6
    76
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests≈ 69 (est.)78
    Reviews found online7075

    iceGUARD iG51v: 40% × 69.2 (est.) + 60% × 69.7 = 70

    Observe GSi-6 HP: 40% × 77.5 + 60% × 74.5 = 76

    No road tests of comfort for iceGUARD iG51v. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 63

    Noise

    Observe GSi-6 HP +7
    70
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests≈ 67 (est.)72
    Reviews found online58≈ 67 (est.)

    iceGUARD iG51v: 60% × 66.6 (est.) + 40% × 57.8 = 63

    Observe GSi-6 HP: 60% × 71.7 + 40% × 66.6 (est.) = 70

    No road tests of noise for iceGUARD iG51v. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

    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.

  6. 55

    Treadwear

    Observe GSi-6 HP +6
    61
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score)≈ 60 (est.)≈ 63 (est.)
    Reviews found online4958

    iceGUARD iG51v: 60% × 60 (est.) + 40% × 48.6 = 55

    Observe GSi-6 HP: 60% × 63.3 (est.) + 40% × 58.2 = 61

    No road tests of treadwear for iceGUARD iG51v. 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 Observe GSi-6 HP. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

  7. –

    Handling (owners)

    No comparison
    76
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Reviews found online–76
  8. –

    Efficiency

    No comparison
    66
    Why this score
    SourceiceGUARD iG51vObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–66
Scores at a glance
CategoryYokohama iceGUARD iG51vToyo Observe GSi-6 HP
Relative Score 71 71
Dry 71 75
Wet 78 75
Snow 74 66
Comfort 70 76
Noise 63 70
Treadwear 55 61
Handling (owners) – 76
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
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost

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

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

iceGUARD iG51v

± 7

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 iceGUARD iG51v

Not enough owner reviews yet to extract themes.

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 · Yokohama iceGUARD iG51v B · Toyo Observe GSi-6 HP
CategoryPremium Touring Winter tireWinter
Vehicle typeSUV and 4x4—
Sizes available239
Rim diameters18″16″ – 21″
Tread depth13/32″11 - 12/32″
SidewallBlackwallBlack Side Wall
Max pressure51 psi50 - 51 psi

Which one should you actually buy?

Yokohama iceGUARD iG51v

Toyo Observe GSi-6 HP

Too close to call: Yokohama iceGUARD iG51v and Toyo Observe GSi-6 HP are within 2 points overall. Yokohama iceGUARD iG51v is stronger on snow and wet. Toyo Observe GSi-6 HP is stronger on noise, comfort and treadwear. Yokohama iceGUARD iG51v rests on little evidence so far (0 tests, 11 reviews), so read this result as provisional.

Pick tire A You drive through snowy winters

Yokohama iceGUARD iG51v scores 74 vs 66 on snow.

Pick tire B You want a quieter cabin

Toyo Observe GSi-6 HP scores 70 vs 63 on noise.

Pick tire B You want the most comfortable ride

Toyo Observe GSi-6 HP scores 76 vs 70 on comfort.

Pick tire B You want the longest tread life

Toyo Observe GSi-6 HP scores 61 vs 55 on treadwear.

Tire A · Yokohama iceGUARD iG51v
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Tire B · Toyo Observe GSi-6 HP
Check price on Amazon

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iceGUARD iG51v or Observe GSi-6 HP?

Which is better in the wet, iceGUARD iG51v or Observe GSi-6 HP?

Yokohama iceGUARD iG51v, 78 vs 75 on our wet score.

Which grips better on dry roads, iceGUARD iG51v or Observe GSi-6 HP?

Toyo Observe GSi-6 HP, 75 vs 71 on our dry score.

Which is better in snow, iceGUARD iG51v or Observe GSi-6 HP?

Yokohama iceGUARD iG51v, 74 vs 66 on our snow score.

Which is quieter, iceGUARD iG51v or Observe GSi-6 HP?

Toyo Observe GSi-6 HP, 70 vs 63 on our noise score.

Which is more comfortable, iceGUARD iG51v or Observe GSi-6 HP?

Toyo Observe GSi-6 HP, 76 vs 70 on our comfort score.

Which lasts longer, iceGUARD iG51v or Observe GSi-6 HP?

Toyo Observe GSi-6 HP, 61 vs 55 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