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Toyo Proxes RA1 looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.

Head-to-head Updated

Michelin Primacy MXM4 vs Toyo Proxes RA1 — Compared

Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 1 + 0 road tests and 10 + 11 owner reviews. How we score

Proxes RA1 leads, 66–64 Narrow edge

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Toyo Proxes RA1
Tire BToyo

Proxes RA1

Summer Trackday and Competition tires

Provisional

Tests – · none yet Owners 65 · 11 reviews

Category by category

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

  1. 75

    Dry

    Level
    75
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score) · 1 / – tests87≈ 72 (est.)
    Reviews found online5779

    Primacy MXM4: 60% × 86.7 + 40% × 56.7 = 75

    Proxes RA1: 60% × 72.1 (est.) + 40% × 78.5 = 75

    No road tests of dry for Proxes RA1. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).

  2. 58

    Wet

    Proxes RA1 +6
    64
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score) · 1 / – tests56≈ 65 (est.)
    Reviews found online6161

    Primacy MXM4: 60% × 56.1 + 40% × 61.1 = 58

    Proxes RA1: 60% × 65 (est.) + 40% × 61.3 = 64

    No road tests of wet for Proxes RA1. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).

  3. 56

    Snow

    Primacy MXM4 +7
    49
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score)≈ 62 (est.)≈ 58 (est.)
    Reviews found online4734

    Primacy MXM4: 60% × 62.3 (est.) + 40% × 47 = 56

    Proxes RA1: 60% × 58.2 (est.) + 40% × 34.4 = 49

    No road tests of snow for Primacy MXM4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

    No road tests of snow for Proxes RA1. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).

  4. 60

    Comfort

    Proxes RA1 +7
    67
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score) · 1 / – tests64≈ 69 (est.)
    Reviews found online5366

    Primacy MXM4: 60% × 63.9 + 40% × 53.1 = 60

    Proxes RA1: 60% × 68.5 (est.) + 40% × 65.7 = 67

    No road tests of comfort for Proxes RA1. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  5. 73

    Noise

    Primacy MXM4 +5
    68
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score) · 1 / – tests82≈ 67 (est.)
    Reviews found online6070

    Primacy MXM4: 60% × 81.5 + 40% × 59.6 = 73

    Proxes RA1: 60% × 67.3 (est.) + 40% × 70.1 = 68

    No road tests of noise for Proxes RA1. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.

  6. 63

    Treadwear

    Proxes RA1 +4
    67
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Professional tests (TWG score)≈ 64 (est.)≈ 66 (est.)
    Reviews found online6168

    Primacy MXM4: 60% × 64.3 (est.) + 40% × 61.3 = 63

    Proxes RA1: 60% × 66.2 (est.) + 40% × 67.6 = 67

    No road tests of treadwear for Primacy MXM4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

    No road tests of treadwear for Proxes RA1. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).

  7. 54

    Handling (owners)

    Proxes RA1 +19
    73
    Why this score
    SourcePrimacy MXM4Proxes RA1
    Reviews found online5473
Scores at a glance
CategoryMichelin Primacy MXM4Toyo Proxes RA1
Relative Score 64 66
Dry 75 75
Wet 58 64
Snow 56 49
Comfort 60 67
Noise 73 68
Treadwear 63 67
Handling (owners) 54 73

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
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Neutral
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Less important
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Neutral
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Recomputed
Headline score

Primacy MXM4

Proxes RA1

Pros, cons & observations

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

Tire A Primacy MXM4

Pros

  • Exceptional ride comfort and vibration dampening
  • Strong tread life and durability
  • High fuel efficiency

Cons

  • Mediocre dry grip and handling precision
  • Noticeable understeer when cornering
  • Soft sidewalls that lack steering feedback
All owner themes in the Primacy MXM4 review

Tire B Proxes RA1

Pros

  • Exceptional dry grip that remains consistent even as the tread wears down.
  • Superior tire life compared to many other dedicated track-focused compounds.
  • Predictable breakaway characteristics that provide driver confidence at the limit.

Cons

  • Performance can become 'greasy' if the tire is overdriven or overheated during long sessions.
  • Requires proper heat cycling and break-in procedures to achieve optimal performance.
  • Sensitive to alignment settings, which can lead to accelerated or uneven wear if not managed.
All owner themes in the Proxes RA1 review

Specs side by side

Attribute A · Michelin Primacy MXM4 B · Toyo Proxes RA1
CategoryAll SeasonSummer Trackday and Competition tires
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available27
Rim diameters18″15″ – 18″
Tread depth—8/32″
UTQG—100 AA A
Sidewall—Black Side Wall
Max pressure—44 psi

Which one should you actually buy?

Michelin Primacy MXM4

Toyo Proxes RA1

Narrow edge: Toyo Proxes RA1 — better handling, comfort and wet. Pick the Michelin Primacy MXM4 if snow and noise matter most to you. Michelin Primacy MXM4 rests on little evidence so far (1 test, 10 reviews), so read this result as provisional. Toyo Proxes RA1 rests on little evidence so far (0 tests, 11 reviews), so read this result as provisional.

Pick tire B You enjoy sharp, responsive handling

Toyo Proxes RA1 scores 73 vs 54 on handling.

Pick tire A You drive through snowy winters

Michelin Primacy MXM4 scores 56 vs 49 on snow.

Pick tire B You want the most comfortable ride

Toyo Proxes RA1 scores 67 vs 60 on comfort.

Pick tire B Your priority is wet-weather safety

Toyo Proxes RA1 scores 64 vs 58 on wet.

Tire A · Michelin Primacy MXM4
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Tire B · Toyo Proxes RA1
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Primacy MXM4 or Proxes RA1?

Which is better in the wet, Primacy MXM4 or Proxes RA1?

Toyo Proxes RA1, 64 vs 58 on our wet score.

Which grips better on dry roads, Primacy MXM4 or Proxes RA1?

Neither, by our numbers: 75 vs 75 on the dry score, within 3 points.

Which is better in snow, Primacy MXM4 or Proxes RA1?

Michelin Primacy MXM4, 56 vs 49 on our snow score.

Which is quieter, Primacy MXM4 or Proxes RA1?

Michelin Primacy MXM4, 73 vs 68 on our noise score.

Which is more comfortable, Primacy MXM4 or Proxes RA1?

Toyo Proxes RA1, 67 vs 60 on our comfort score.

Which lasts longer, Primacy MXM4 or Proxes RA1?

Toyo Proxes RA1, 67 vs 63 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