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Cooper Discoverer M+S Sport looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Cooper Discoverer M+S Sport 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 2 + 14 owner reviews. How we score

Check price on Amazon · Discoverer M+S Sport Check price on Amazon · Observe GSi-6 HP
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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. –

    Dry

    No comparison
    75
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–73
    Reviews found online–77

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

  2. –

    Wet

    No comparison
    75
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 2 tests–71
    Reviews found online–81

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

  3. –

    Snow

    No comparison
    66
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 2 tests–60
    Reviews found online–75

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

  4. –

    Comfort

    No comparison
    76
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–78
    Reviews found online–74

    Observe GSi-6 HP: 40% × 77.5 + 60% × 74.4 = 76

  5. –

    Noise

    No comparison
    70
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–72
    Reviews found online–≈ 67 (est.)

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

    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. –

    Treadwear

    No comparison
    61
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score)–≈ 63 (est.)
    Reviews found online–58

    Observe GSi-6 HP: 60% × 63.4 (est.) + 40% × 58.3 = 61

    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
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Reviews found online–76
  8. –

    Efficiency

    No comparison
    66
    Why this score
    SourceDiscoverer M+S SportObserve GSi-6 HP
    Professional tests (TWG score) · – / 1 tests–66
Scores at a glance
CategoryCooper Discoverer M+S SportToyo Observe GSi-6 HP
Relative Score – 71
Dry – 75
Wet – 75
Snow – 66
Comfort – 76
Noise – 70
Treadwear – 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
Not important
NotLessNeutralImportantMost
Recomputed
Headline score

Discoverer M+S Sport

± 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.

DisciplineCategoryDiscoverer M+S SportObserve GSi-6 HPΔHead-to-head
Also published by the testers (not in the score)
Overall Ranking Overall #6/7 2012 Auto Bild SUV and 4x4 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 Discoverer M+S Sport

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 · Cooper Discoverer M+S Sport B · Toyo Observe GSi-6 HP
CategoryHigh Performance Winter tireWinter
Vehicle typeSUV and 4x4—
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?

Cooper Discoverer M+S Sport

Toyo Observe GSi-6 HP

Only Toyo Observe GSi-6 HP has enough test and review data for a Relative Score, so there is no head-to-head winner yet.

Tire A · Cooper Discoverer M+S Sport
Check price on Amazon
Tire B · Toyo Observe GSi-6 HP
Check price on Amazon

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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.

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