Tests – · none yet Owners 57 · 13 reviews
Head-to-head
Updated
Bridgestone S20 vs Michelin Pilot Road 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 + 0 road tests and 13 + 19 owner reviews. How we score
Pilot Road 4 is ahead, 74–63
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Tests – · none yet Owners 76 · 19 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
65
Dry
Pilot Road 4 +873Why this score
Source S20 Pilot Road 4 Professional tests (TWG score) ≈ 66 (est.) ≈ 71 (est.) Reviews found online 64 76 S20: 60% × 66.1 (est.) + 40% × 63.5 = 65
Pilot Road 4: 60% × 71.3 (est.) + 40% × 76.1 = 73
No road tests of dry for S20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
No road tests of dry for Pilot Road 4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
-
66
Wet
Pilot Road 4 +1278Why this score
Source S20 Pilot Road 4 Professional tests (TWG score) ≈ 67 (est.) ≈ 76 (est.) Reviews found online 65 81 S20: 60% × 67.5 (est.) + 40% × 64.8 = 66
Pilot Road 4: 60% × 76.1 (est.) + 40% × 80.5 = 78
No road tests of wet for S20. 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 Pilot Road 4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
-
65
Comfort
Pilot Road 4 +873Why this score
Source S20 Pilot Road 4 Professional tests (TWG score) ≈ 68 (est.) ≈ 70 (est.) Reviews found online 64 75 S20: 40% × 67.6 (est.) + 60% × 63.5 = 65
Pilot Road 4: 40% × 69.9 (est.) + 60% × 74.8 = 73
No road tests of comfort for S20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
No road tests of comfort for Pilot Road 4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
-
50
Treadwear
Pilot Road 4 +2070Why this score
Source S20 Pilot Road 4 Professional tests (TWG score) ≈ 57 (est.) ≈ 69 (est.) Reviews found online 39 73 S20: 60% × 56.7 (est.) + 40% × 39.4 = 50
Pilot Road 4: 60% × 68.8 (est.) + 40% × 72.7 = 70
No road tests of treadwear for S20. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
No road tests of treadwear for Pilot Road 4. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
-
67
Handling (owners)
Pilot Road 4 +875Why this score
Source S20 Pilot Road 4 Reviews found online 67 75
Scores at a glance
| Category | Bridgestone S20 | Michelin Pilot Road 4 |
|---|---|---|
| Relative Score | 63 | 74 |
| Dry | 65 | 73 |
| Wet | 66 | 78 |
| Comfort | 65 | 73 |
| Treadwear | 50 | 70 |
| Handling (owners) | 67 | 75 |
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
63
/ 100
S20
74
/ 100
Pilot Road 4
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A S20
Pros
- Exceptional grip levels in both wet and dry conditions
- Progressive and predictable handling characteristics
- Strong performance during aggressive road riding and track use
Cons
- Very short tread life, particularly on high-torque motorcycles
- Rapid degradation and squaring off of the rear tire
- Front tire can be slow to reach optimal operating temperature
Tire B Pilot Road 4
Pros
- Outstanding wet weather grip and performance
- Impressive tread life and mileage longevity for touring and commuting
- Predictable and confident handling in everyday dry and wet conditions
Cons
- Slippery when brand new, requiring a cautious break-in period
- Tread pattern can cause movement or a vague front-end feel in warmer weather
- Some riders experienced uneven wear or quicker wear on the front tire
Specs side by side
| Attribute | A · Bridgestone S20 | B · Michelin Pilot Road 4 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Motorcycle | Motorcycle |
Which one should you actually buy?
63
/ 100
Bridgestone S20
74
/ 100
Michelin Pilot Road 4
Winner: Michelin Pilot Road 4 — better treadwear, wet and dry. It leads or ties in every category we score. Bridgestone S20 rests on little evidence so far (0 tests, 13 reviews), so read this result as provisional. Michelin Pilot Road 4 rests on little evidence so far (0 tests, 19 reviews), so read this result as provisional.
Pick tire B
You want the longest tread life
Michelin Pilot Road 4 scores 70 vs 50 on treadwear.
Pick tire B
Your priority is wet-weather safety
Michelin Pilot Road 4 scores 78 vs 66 on wet.
Pick tire B
You want the most grip on dry roads
Michelin Pilot Road 4 scores 73 vs 65 on dry.
Pick tire B
You want the most comfortable ride
Michelin Pilot Road 4 scores 73 vs 65 on comfort.
Tire A · Bridgestone S20
Tire B · Michelin Pilot Road 4
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S20 or Pilot Road 4?
Which is better in the wet, S20 or Pilot Road 4?
Michelin Pilot Road 4, 78 vs 66 on our wet score.
Which grips better on dry roads, S20 or Pilot Road 4?
Michelin Pilot Road 4, 73 vs 65 on our dry score.
Which is more comfortable, S20 or Pilot Road 4?
Michelin Pilot Road 4, 73 vs 65 on our comfort score.
Which lasts longer, S20 or Pilot Road 4?
Michelin Pilot Road 4, 70 vs 50 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