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Bridgestone Potenza RE050A RFT vs Michelin Primacy MXM4 ZP — 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 + 0 road tests and 10 + 1 owner reviews. How we score

Check price on Amazon · Potenza RE050A RFT Check price on Amazon · Primacy MXM4 ZP
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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. 48

    Dry

    No comparison
    –
    Why this score
    SourcePotenza RE050A RFTPrimacy MXM4 ZP
    Professional tests (TWG score)≈ 55 (est.)–
    Reviews found online37–

    Potenza RE050A RFT: 60% × 54.9 (est.) + 40% × 36.7 = 48

    No road tests of dry for Potenza RE050A RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 48

    Wet

    No comparison
    –
    Why this score
    SourcePotenza RE050A RFTPrimacy MXM4 ZP
    Professional tests (TWG score)≈ 54 (est.)–
    Reviews found online40–

    Potenza RE050A RFT: 60% × 53.8 (est.) + 40% × 40 = 48

    No road tests of wet for Potenza RE050A RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 35

    Comfort

    No comparison
    –
    Why this score
    SourcePotenza RE050A RFTPrimacy MXM4 ZP
    Professional tests (TWG score)≈ 60 (est.)–
    Reviews found online18–

    Potenza RE050A RFT: 40% × 59.8 (est.) + 60% × 18.3 = 35

    No road tests of comfort for Potenza RE050A RFT. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  4. 41

    Treadwear

    No comparison
    –
    Why this score
    SourcePotenza RE050A RFTPrimacy MXM4 ZP
    Professional tests (TWG score)≈ 52 (est.)–
    Reviews found online25–

    Potenza RE050A RFT: 60% × 51.8 (est.) + 40% × 24.9 = 41

    No road tests of treadwear for Potenza RE050A RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

Scores at a glance
CategoryBridgestone Potenza RE050A RFTMichelin Primacy MXM4 ZP
Relative Score 45 –
Dry 48 –
Wet 48 –
Comfort 35 –
Treadwear 41 –

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
Neutral
NotLessNeutralImportantMost
Recomputed
Headline score
± 8

Potenza RE050A RFT

Primacy MXM4 ZP

Only categories both tires have data for count toward the headline score.

Specs side by side

Attribute A · Bridgestone Potenza RE050A RFT B · Michelin Primacy MXM4 ZP
CategoryMax Performance Summer tireAll-Season tire
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover

Which one should you actually buy?

Bridgestone Potenza RE050A RFT

Michelin Primacy MXM4 ZP

Only Bridgestone Potenza RE050A RFT has enough test and review data for a Relative Score, so there is no head-to-head winner yet.

Tire A · Bridgestone Potenza RE050A RFT
Check price on Amazon
Tire B · Michelin Primacy MXM4 ZP
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