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Toyo T1S looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Michelin Primacy 4+ vs Toyo T1S — Compared

Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 10 + 0 road tests and 39 + 10 owner reviews. How we score

Primacy 4+ is ahead, 78–53

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Michelin Primacy 4+
Tire AMichelin

Primacy 4+

Summer

Tests 83 · 10 tests Owners 72 · 39 reviews

Best test result: #1 of 16 in 2024 ADAC Summer Tyre Test (abrasion)

Toyo T1S
Tire BToyo

T1S

Summer

Provisional

Tests – · none yet Owners 46 · 10 reviews

Category by category

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

  1. 78

    Dry

    Primacy 4+ +26
    52
    Why this score
    SourcePrimacy 4+T1S
    Professional tests (TWG score) · 9 / – tests82≈ 58 (est.)
    Reviews found online7243

    Primacy 4+: 60% × 81.9 + 40% × 71.8 = 78

    T1S: 60% × 57.7 (est.) + 40% × 42.8 = 52

    No road tests of dry for T1S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 79

    Wet

    Primacy 4+ +28
    51
    Why this score
    SourcePrimacy 4+T1S
    Professional tests (TWG score) · 9 / – tests82≈ 55 (est.)
    Reviews found online7544

    Primacy 4+: 60% × 81.7 + 40% × 75.4 = 79

    T1S: 60% × 55.5 (est.) + 40% × 44.2 = 51

    No road tests of wet for T1S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 73

    Comfort

    Primacy 4+ +14
    59
    Why this score
    SourcePrimacy 4+T1S
    Professional tests (TWG score) · 1 / – tests73≈ 66 (est.)
    Reviews found online7249

    Primacy 4+: 60% × 73.2 + 40% × 71.7 = 73

    T1S: 60% × 65.6 (est.) + 40% × 48.6 = 59

    No road tests of comfort for T1S. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  4. 73

    Noise

    No comparison
    –
    Why this score
    SourcePrimacy 4+T1S
    Professional tests (TWG score) · 7 / – tests77–
    Reviews found online≈ 67 (est.)–

    Primacy 4+: 60% × 76.5 + 40% × 67.3 (est.) = 73

    No owner ratings of noise for Primacy 4+. 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.

  5. 82

    Treadwear

    Primacy 4+ +25
    57
    Why this score
    SourcePrimacy 4+T1S
    Professional tests (TWG score) · 4 / – tests90≈ 61 (est.)
    Reviews found online7050

    Primacy 4+: 60% × 89.8 + 40% × 70.3 = 82

    T1S: 60% × 60.9 (est.) + 40% × 50.3 = 57

    No road tests of treadwear for T1S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

  6. 68

    Handling (owners)

    Primacy 4+ +22
    46
    Why this score
    SourcePrimacy 4+T1S
    Reviews found online6846
Scores at a glance
CategoryMichelin Primacy 4+Toyo T1S
Relative Score 78 53
Dry 78 52
Wet 79 51
Comfort 73 59
Noise 73 –
Treadwear 82 57
Handling (owners) 68 46

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
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
Recomputed
Headline score

Primacy 4+

T1S

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 Primacy 4+

Pros

  • Excellent ride comfort and a smooth, compliant 'limousine-like' feel over bumps
  • Strong and reliable grip in both wet and dry conditions, inspiring confidence
  • Noticeable improvement in quietness and traction compared to predecessor tires or factory options

Cons

  • Loud road noise and a harsh drone on rough or coarse asphalt surfaces
  • Soft sidewalls can reduce steering agility and initial responsiveness compared to dedicated sport tires
  • High premium price point relative to competitors
All owner themes in the Primacy 4+ review

Tire B T1S

Pros

  • Strong dry-weather grip and handling
  • Excellent value for the price point
  • Good steering feedback and road feel

Cons

  • Unpredictable or poor traction in wet and cold conditions
  • Long break-in period required for optimal grip
  • Inconsistent performance across different vehicle power outputs
All owner themes in the T1S review

Specs side by side

Attribute A · Michelin Primacy 4+ B · Toyo T1S
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available66—
Rim diameters16″ – 21″—

Which one should you actually buy?

Michelin Primacy 4+

Toyo T1S

Winner: Michelin Primacy 4+ — better wet, dry and treadwear. It leads or ties in every category we score. Toyo T1S rests on little evidence so far (0 tests, 10 reviews), so read this result as provisional.

Pick tire A Your priority is wet-weather safety

Michelin Primacy 4+ scores 79 vs 51 on wet.

Pick tire A You want the most grip on dry roads

Michelin Primacy 4+ scores 78 vs 52 on dry.

Pick tire A You want the longest tread life

Michelin Primacy 4+ scores 82 vs 57 on treadwear.

Pick tire A You enjoy sharp, responsive handling

Michelin Primacy 4+ scores 68 vs 46 on handling.

Tire A · Michelin Primacy 4+
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Tire B · Toyo T1S
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Primacy 4+ or T1S?

Which is better in the wet, Primacy 4+ or T1S?

Michelin Primacy 4+, 79 vs 51 on our wet score.

Which grips better on dry roads, Primacy 4+ or T1S?

Michelin Primacy 4+, 78 vs 52 on our dry score.

Which is more comfortable, Primacy 4+ or T1S?

Michelin Primacy 4+, 73 vs 59 on our comfort score.

Which lasts longer, Primacy 4+ or T1S?

Michelin Primacy 4+, 82 vs 57 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