tirewheelguide
Head-to-head Updated

Bridgestone Alenza AS Ultra vs Michelin Primacy 4+ — 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 + 10 road tests and 13 + 40 owner reviews. How we score

Primacy 4+ is ahead, 77–64

Check price on Amazon · Primacy 4+ or Alenza AS Ultra on Amazon
Add your size for an exact match
/R

Both Amazon links then search this exact size.

TireWheelGuide may earn a commission from purchases made through these links.

Michelin Primacy 4+
Tire BMichelin

Primacy 4+

Summer

± 4

Tests 85 · 10 tests Owners 71 · 40 reviews

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

Category by category

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

  1. 66

    Dry

    Primacy 4+ +12
    78
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 9 tests≈ 67 (est.)82
    Reviews found online6571

    Alenza AS Ultra: 60% × 66.6 (est.) + 40% × 64.7 = 66

    Primacy 4+: 60% × 82.4 + 40% × 71 = 78

    No road tests of dry for Alenza AS Ultra. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 69

    Wet

    Primacy 4+ +10
    79
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 9 tests≈ 70 (est.)82
    Reviews found online6975

    Alenza AS Ultra: 60% × 69.7 (est.) + 40% × 68.8 = 69

    Primacy 4+: 60% × 82.1 + 40% × 74.6 = 79

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

  3. 69

    Snow

    No comparison
    –
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score)≈ 70 (est.)–
    Reviews found online69–

    Alenza AS Ultra: 60% × 70 (est.) + 40% × 68.8 = 69

    No road tests of snow for Alenza AS Ultra. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 64

    Comfort

    Primacy 4+ +7
    71
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 1 tests≈ 67 (est.)73
    Reviews found online6269

    Alenza AS Ultra: 40% × 67.4 (est.) + 60% × 62.1 = 64

    Primacy 4+: 40% × 72.9 + 60% × 69.3 = 71

    No road tests of comfort for Alenza AS Ultra. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 62

    Noise

    Primacy 4+ +10
    72
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 7 tests≈ 66 (est.)76
    Reviews found online56≈ 66 (est.)

    Alenza AS Ultra: 60% × 66.3 (est.) + 40% × 55.8 = 62

    Primacy 4+: 60% × 76.2 + 40% × 66.3 (est.) = 72

    No road tests of noise for Alenza AS Ultra. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

    No owner ratings of noise for Primacy 4+. The owner half is the owners’ average (66): owners’ noise ratings barely follow the road tests, so the tests say nothing about how owners would rate it.

  6. 54

    Treadwear

    Primacy 4+ +31
    85
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 4 tests≈ 59 (est.)95
    Reviews found online4670

    Alenza AS Ultra: 60% × 59.3 (est.) + 40% × 46.4 = 54

    Primacy 4+: 60% × 94.9 + 40% × 69.6 = 85

    No road tests of treadwear for Alenza AS Ultra. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 62

    Handling (owners)

    Primacy 4+ +4
    66
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Reviews found online6266
  8. –

    Efficiency

    No comparison
    78
    Why this score
    SourceAlenza AS UltraPrimacy 4+
    Professional tests (TWG score) · – / 8 tests–78
Scores at a glance
CategoryBridgestone Alenza AS UltraMichelin Primacy 4+
Relative Score 64 77
Dry 66 78
Wet 69 79
Snow 69 –
Comfort 64 71
Noise 62 72
Treadwear 54 85
Handling (owners) 62 66
Efficiency – 78

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
Neutral
NotLessNeutralImportantMost

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Not important
NotLessNeutralImportantMost

Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.

Recomputed
Headline score
± 8

Alenza AS Ultra

± 4

Primacy 4+

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 Alenza AS Ultra

Pros

  • Strong traction on both wet and dry road surfaces
  • Improved ride comfort and handling compared to some factory-installed alternatives
  • Capable performance in varied weather conditions for some users

Cons

  • Reports of premature tread wear and short service life
  • Noticeable road noise compared to other premium tires
  • Inconsistent performance in severe winter conditions, particularly on ice and deep snow
All owner themes in the Alenza AS Ultra review

Tire B Primacy 4+

Pros

  • Strong wet and dry grip and braking confidence, often cited as a big improvement over Bridgestone, Dunlop and Nexen tyres, including on powerful cars and PHEVs that previously spun their tyres
  • Comfortable, compliant ride with soft sidewalls that suits softly sprung and family cars
  • Low and even tread wear, with several owners reporting little visible wear after 5,000–10,000 miles and one reporting about 60,000 km in hot climates

Cons

  • Road noise and drone, especially on rough asphalt, was described as severe by several owners (Skoda Yeti, Lexus), contradicting other reports of quiet running
  • Reduced grip and confidence in cold, damp conditions, with two UK owners saying the tyre behaves like a budget tyre
  • Premium pricing, with some owners questioning value when life fell short of expectations
All owner themes in the Primacy 4+ review

Specs side by side

Attribute A · Bridgestone Alenza AS Ultra B · Michelin Primacy 4+
CategoryAll SeasonSummer
Vehicle typeSUV and 4x4Passenger Car / Crossover
Sizes available4666
Rim diameters16″ – 22″16″ – 21″
Tread depth10/32″—
UTQG800 A A—
Treadwear warranty80,000 mi—
SidewallBlackwall—
Max pressure44 psi—
Sizes in common66

Which one should you actually buy?

Bridgestone Alenza AS Ultra

Michelin Primacy 4+

Winner: Michelin Primacy 4+ — better treadwear, dry and wet. It leads or ties in every category we score. Bridgestone Alenza AS Ultra rests on little evidence so far (0 tests, 13 reviews), so read this result as provisional.

Pick tire B You want the longest tread life

Michelin Primacy 4+ scores 85 vs 54 on treadwear.

Pick tire B You want the most grip on dry roads

Michelin Primacy 4+ scores 78 vs 66 on dry.

Pick tire B Your priority is wet-weather safety

Michelin Primacy 4+ scores 79 vs 69 on wet.

Pick tire B You want a quieter cabin

Michelin Primacy 4+ scores 72 vs 62 on noise.

Tire A · Bridgestone Alenza AS Ultra
Check price on Amazon
Tire B · Michelin Primacy 4+
Check price on Amazon

TireWheelGuide may earn a commission from purchases made through these links.

Alenza AS Ultra or Primacy 4+?

Which is better in the wet, Alenza AS Ultra or Primacy 4+?

Michelin Primacy 4+, 79 vs 69 on our wet score.

Which grips better on dry roads, Alenza AS Ultra or Primacy 4+?

Michelin Primacy 4+, 78 vs 66 on our dry score.

Which is quieter, Alenza AS Ultra or Primacy 4+?

Michelin Primacy 4+, 72 vs 62 on our noise score.

Which is more comfortable, Alenza AS Ultra or Primacy 4+?

Michelin Primacy 4+, 71 vs 64 on our comfort score.

Which lasts longer, Alenza AS Ultra or Primacy 4+?

Michelin Primacy 4+, 85 vs 54 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