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Cooper Discoverer STT PRO vs Yokohama iceGUARD iG30 — Compared

Relative Score (0–100): 60% professional tests, 40% owner reviews.

Check price on Amazon · Discoverer STT PRO Check price on Amazon · iceGUARD iG30
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Category by category

Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.

  1. 67

    Dry

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online66–
  2. 69

    Wet

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online68–
  3. 67

    Snow

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online65–
  4. 62

    Comfort

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online55–
  5. 53

    Noise

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online37–
  6. 64

    Treadwear

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online63–
  7. 57

    Handling

    No comparison
    –
    Why this score
    SourceDiscoverer STT PROiceGUARD iG30
    Reviews found online57–
Scores at a glance
CategoryCooper Discoverer STT PROYokohama iceGUARD iG30
Relative Score 64 –
Dry 67 –
Wet 69 –
Snow 67 –
Comfort 62 –
Noise 53 –
Treadwear 64 –
Handling 57 –

Higher is better. The Relative Score follows your weights below; category scores do not change.

Weight the categories that matter to you

Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.

Important
NoneLessNeutralMoreMost
Important
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Neutral
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Less important
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Less important
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Important
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Neutral
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Recomputed
Headline score

Discoverer STT PRO

iceGUARD iG30

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 Discoverer STT PRO

Pros

  • Outstanding off-road traction in mud, rocks, and dirt
  • Surprisingly low road noise and smooth ride for a mud-terrain tire
  • Aggressive and appealing visual design with tough sidewalls

Cons

  • Can be difficult to balance properly, leading to vibrations for some users
  • Faster tread wear reported by a subset of drivers under heavy use
  • Reduced traction in specific conditions like deep sand or packed snow/ice
All owner themes in the Discoverer STT PRO review

Tire B iceGUARD iG30

Cons

  • Extremely rapid tread wear
  • Poor traction on ice and snow
  • Inadequate handling on wet and dry surfaces
All owner themes in the iceGUARD iG30 review

Specs side by side

Attribute A · Cooper Discoverer STT PRO B · Yokohama iceGUARD iG30
CategoryAll SeasonWinter Touring tires
Vehicle typeSUV and 4x4Passenger Car / Crossover
Sizes available23—
Rim diameters16″ – 20″—
Tread depth18 - 22/32″—
SidewallBlack Side Wall - Raised White Lettering—
Max pressure35 - 80 psi—

Which one should you actually buy?

Cooper Discoverer STT PRO

Yokohama iceGUARD iG30

Only Cooper Discoverer STT PRO has enough test and review data for a Relative Score, so there is no head-to-head winner yet.

Tire A · Cooper Discoverer STT PRO
Check price on Amazon
Tire B · Yokohama iceGUARD iG30
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.

Community buzz from Reddit and forums is shown for context only — it never changes the score.