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Michelin Power 5 vs Avon Spirit ST — 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 16 + 14 owner reviews. How we score

Spirit ST is ahead, 81–71

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Michelin Power 5
Tire AMichelin

Power 5

Summer

± 8Provisional

Tests – · none yet Owners 70 · 16 reviews

Avon Spirit ST
Tire BAvon

Spirit ST

Summer

± 8Provisional

Tests – · none yet Owners 86 · 14 reviews

Category by category

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

  1. 72

    Dry

    Spirit ST +9
    81
    Why this score
    SourcePower 5Spirit ST
    Professional tests (TWG score)≈ 70 (est.)≈ 76 (est.)
    Reviews found online7388

    Power 5: 60% × 70.3 (est.) + 40% × 73.4 = 72

    Spirit ST: 60% × 76.3 (est.) + 40% × 87.6 = 81

    No road tests of dry for Power 5. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

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

  2. 74

    Wet

    Spirit ST +12
    86
    Why this score
    SourcePower 5Spirit ST
    Professional tests (TWG score)≈ 73 (est.)≈ 83 (est.)
    Reviews found online7592

    Power 5: 60% × 73.1 (est.) + 40% × 74.9 = 74

    Spirit ST: 60% × 82.6 (est.) + 40% × 92.1 = 86

    No road tests of wet for Power 5. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

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

  3. 71

    Comfort

    Spirit ST +6
    77
    Why this score
    SourcePower 5Spirit ST
    Professional tests (TWG score)≈ 70 (est.)≈ 71 (est.)
    Reviews found online7281

    Power 5: 40% × 69.7 (est.) + 60% × 72.3 = 71

    Spirit ST: 40% × 71.3 (est.) + 60% × 80.9 = 77

    No road tests of comfort for Power 5 or Spirit ST. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.

  4. 63

    Treadwear

    Spirit ST +11
    74
    Why this score
    SourcePower 5Spirit ST
    Professional tests (TWG score)≈ 64 (est.)≈ 71 (est.)
    Reviews found online6279

    Power 5: 60% × 64.5 (est.) + 40% × 61.5 = 63

    Spirit ST: 60% × 70.5 (est.) + 40% × 78.6 = 74

    No road tests of treadwear for Power 5. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).

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

  5. 73

    Handling (owners)

    Spirit ST +12
    85
    Why this score
    SourcePower 5Spirit ST
    Reviews found online7385
Scores at a glance
CategoryMichelin Power 5Avon Spirit ST
Relative Score 71 81
Dry 72 81
Wet 74 86
Comfort 71 77
Treadwear 63 74
Handling (owners) 73 85

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
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
± 8

Power 5

± 8

Spirit ST

Pros, cons & observations

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

Tire A Power 5

Pros

  • Exceptional wet-weather grip and stability in standing water
  • Rapid warm-up times, even in cooler ambient temperatures
  • Agile handling and predictable cornering behavior on public roads

Cons

  • Tendency for the rear tire to square off prematurely
  • Inconsistent performance and grip degradation as the tire reaches the end of its life
  • Lack of confidence at maximum lean angles compared to dedicated track tires
All owner themes in the Power 5 review

Tire B Spirit ST

Pros

  • Excellent wet and dry weather grip
  • High durability and resistance to squaring off
  • Strong value proposition compared to premium competitors

Cons

  • Reports of vague steering feedback and reluctance to turn on certain bikes
  • Inconsistent quality control leading to high-speed vibrations for some users
  • Poor customer support resolution for warranty claims
All owner themes in the Spirit ST review

Specs side by side

Attribute A · Michelin Power 5 B · Avon Spirit ST
CategorySummerSummer
Vehicle typeMotorcycleMotorcycle

Which one should you actually buy?

Michelin Power 5

Avon Spirit ST

Winner: Avon Spirit ST — better wet, handling and treadwear. It leads or ties in every category we score. Michelin Power 5 rests on little evidence so far (0 tests, 16 reviews), so read this result as provisional. Avon Spirit ST rests on little evidence so far (0 tests, 14 reviews), so read this result as provisional.

Pick tire B Your priority is wet-weather safety

Avon Spirit ST scores 86 vs 74 on wet.

Pick tire B You enjoy sharp, responsive handling

Avon Spirit ST scores 85 vs 73 on handling.

Pick tire B You want the longest tread life

Avon Spirit ST scores 74 vs 63 on treadwear.

Pick tire B You want the most grip on dry roads

Avon Spirit ST scores 81 vs 72 on dry.

Tire A · Michelin Power 5
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Tire B · Avon Spirit ST
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Power 5 or Spirit ST?

Which is better in the wet, Power 5 or Spirit ST?

Avon Spirit ST, 86 vs 74 on our wet score.

Which grips better on dry roads, Power 5 or Spirit ST?

Avon Spirit ST, 81 vs 72 on our dry score.

Which is more comfortable, Power 5 or Spirit ST?

Avon Spirit ST, 77 vs 71 on our comfort score.

Which lasts longer, Power 5 or Spirit ST?

Avon Spirit ST, 74 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