78
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
79/100
125 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated September 2026
Kumho Ecsta KU39 vs Michelin Pilot Sport 4 S — Compared (September 2026)
Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.
VS
90
/ 100
Objective (60%)
94/100
28 professional tests
User signal (40%)
93/100
2,091 owner reviews
Prices change daily — check the retailer for your size.
VerdictWinner: Michelin Pilot Sport 4 S — better handling, treadwear and wet. It leads or ties in every category we score.
Read full
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Category breakdown
6 categories, side by side
Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
Dry
Score (0–100)
Pilot Sport 4 S leads by 5
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Professional tests (TWG score) | – | 87 |
| Tire Rack owners | – | 95 |
| Tyre Reviews owners | 86 | 92 |
Wet
Score (0–100)
Pilot Sport 4 S leads by 9
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Professional tests (TWG score) | – | 83 |
| Tire Rack owners | – | 88 |
| Tyre Reviews owners | 78 | 87 |
Comfort
Score (0–100)
Pilot Sport 4 S leads by 5
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Professional tests (TWG score) | – | 82 |
| Tire Rack owners | – | 87 |
| Tyre Reviews owners | 81 | 84 |
Noise
Score (0–100)
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Professional tests (TWG score) | – | 78 |
Treadwear
Score (0–100)
Pilot Sport 4 S leads by 17
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Tire Rack owners | – | 80 |
| Tyre Reviews owners | 73 | 80 |
Handling
Score (0–100)
Pilot Sport 4 S leads by 19
Why this score
| Source | Ecsta KU39 | Pilot Sport 4 S |
|---|---|---|
| Tyre Reviews owners | 76 | 86 |
| DriverReviews owners | – | 92 |
Scores at a glance
| Category | Kumho Ecsta KU39 | Michelin Pilot Sport 4 S |
|---|---|---|
| Relative Score | 78 | 90 |
| Dry | 86 | 91 |
| Wet | 78 | 87 |
| Comfort | 81 | 86 |
| Noise | – | 84 |
| Treadwear | 73 | 90 |
| Handling | 76 | 95 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Weight the categories that matter to you
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
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Recomputed
Headline score
78
/ 100
Tire A
90
/ 100
Tire B
Only categories both tires have data for count toward the headline score.
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
The Kumho Ecsta KU39 is widely regarded as a high-value, mid-range performance tire that offers a compelling alternative to premium brands. Users consistently praise its excellent dry and wet grip, comfort, and low noise levels, often noting that it outperforms more expensive tires while significantly reducing road noise and harshness. While most users are satisfied with the performance, some report concerns regarding tread longevity and a soft sidewall that can impact handling precision during aggressive cornering.
Pros
- Exceptional value for money compared to premium competitors
- Strong wet and dry traction
- Outstanding ride comfort and low road noise
- Progressive and predictable handling characteristics
Cons
- Inconsistent tread life, with some users reporting premature wear
- Soft sidewalls can lead to a lack of steering sharpness or 'squirm' under heavy load
- Performance can drop off noticeably as tread depth approaches 3mm
- Occasional reports of sidewall durability issues or blowouts
Observations
- Users transitioning from run-flat tires on BMW and Mini models reported significant improvements in ride comfort and noise reduction.
- Drivers of high-horsepower, rear-wheel-drive vehicles (e.g., BMW 330ci, Jaguar XJ) noted the tire handles power well but can be sensitive to inflation pressure to maintain optimal handling.
- Some users on heavier vehicles or those with aggressive driving styles reported faster-than-expected tread wear.
The Michelin Pilot Sport 4 S is widely regarded as a benchmark ultra-high-performance summer tire, consistently praised for its exceptional wet and dry grip, confidence-inspiring handling, and superior ride comfort compared to OEM run-flat alternatives. While most users laud its versatility and safety, some enthusiasts note that its relatively soft sidewalls can result in slightly less steering precision or feedback compared to more track-focused or stiffer-walled competitors.
Pros
- Exceptional wet and dry traction
- High levels of ride comfort and reduced road noise
- Predictable handling and stability at high speeds
- Excellent rim protection design
- Strong longevity for a high-performance tire
Cons
- Soft sidewalls can feel vague or sluggish during aggressive steering inputs
- High price point compared to competitors
- Performance can degrade significantly as the tread wears down
- Reports of sidewall cracking or perishing in some climates
- Not suitable for cold weather or snow
Observations
- Users transitioning from OEM run-flat tires on luxury and performance vehicles (e.g., BMW, Mercedes, Tesla) report a transformative improvement in ride quality and noise reduction.
- Drivers of high-horsepower, rear-wheel-drive vehicles frequently highlight the tire's ability to put power down effectively, though some note faster wear on rear axles.
- Some users with heavy vehicles or specific performance setups noted that the tire's soft sidewall can lead to a 'bouncy' or less precise feel during rapid direction changes.
Community buzz
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Kumho Ecsta KU39
We haven't collected enough community discussion about this tire yet.
Tire B
Positive
Michelin Pilot Sport 4 S
The Michelin Pilot Sport 4 S is widely praised by the community as a premier max performance summer tire, offering exceptional dry and wet grip, precise steering feel, and refined road manners for daily driving and spirited street use. While some users note higher pricing and relatively quick wear on heavier vehicles or hot tracks, it remains a benchmark choice that many enthusiasts gladly return to despite alternatives like Continental or Kumho.
r/CarTrackDays
·97 upvotes ·2026-05-04
“Tire condition after 1st track day. PS4s on a GR86 First 2 pics are drivers front, rest pass front. This was at CMP, temps mid 70s, mostly cloudy. Lowered TP to 31psi. Highest I saw on track was 36 psi. The driver side l thought looked good, but passengers side inner looks like they melted. Is this track rubber I picked up or due to mostly turning right on this clockwise circuit?? Also was pleasantly surprised to only have used 1/16 of tread depth after 110 minutes on track. Given what I have read, thought the ps4s would be all used up. Maybe on a hot track surface they would have been eaten up. Read more”
r/TyreReviews
·41 upvotes ·2026-03-17
“Am I the owner of the newer PS4s?😁 Hello everyone, new in the sub and just want to share my love for the Pilot Sport 4s. This is the third set and I love it. To me they are the perfect compromise beetween performance anche tyre wear. Last set last me 43k km, I do lot of highway and some spirited drive when possibile. I also had a set of Sport Contact 7, awesome grip, to me better than the PS4s, almost too much for my stock Golf. They also wear out faster. I saw yesterday the review of Potenza Sport Evo and they promise very week, maybe next time I’ll try!”
r/cars
·4 upvotes ·2018-08-21
“I’ll say this. Going from the Pilot Super Sport to the Pilot Sport 4 S of the same size, I’m disappointed in the soft sidewall of the 4 S. This is an 8.5” wide wheel with 235/40/18 tires. The left-right fast slalom action got a bit mushy like the weight transfer was slowed down when I switched to the 4 S. I think a shorter sidewall 4 S would perform better in this way, or the same tire on a 9” wide wheel too. That said, the dry and wet grip is exceptional. To save money, I’d recommend the Continental ExtremeContact Sport.”
r/ft86
·2 upvotes ·2023-06-01
“Depending on the size they are absolutely overkill for street use on stock motor. I just installed a set of 245 ps4s on 17x9 rpf1s and its almost impossible to trigger the abs and traction co trol. The car is on absolute rails. That being said, if you have the money, there is not really any negatives from that. I intend to use mine on track days. Felt the cup 2s were overkill for 2 to 3 track days a year.”
Top themes
#Dry and Wet Grip#Tread Life and Wear#Price vs Value#Track Performance Limits#Daily Comfort and Noise#Alternatives Comparison
Based on 104 community posts
Specifications
Specs side by side
| Attribute | A · Kumho Ecsta KU39 | B · Michelin Pilot Sport 4 S |
|---|---|---|
| Category | Summer Ultra High Performance tires | Summer Max Performance tires |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
Final verdict
Which one should you actually buy?
78
/ 100
Kumho
90
/ 100
Michelin
Winner: Michelin Pilot Sport 4 S — better handling, treadwear and wet. It leads or ties in every category we score.
Pick tire B
You enjoy sharp, responsive handling
Michelin Pilot Sport 4 S scores 95 vs 76 on handling.
Pick tire B
You want the longest tread life
Michelin Pilot Sport 4 S scores 90 vs 73 on treadwear.
Pick tire B
Your priority is wet-weather safety
Michelin Pilot Sport 4 S scores 87 vs 78 on wet.
Pick tire B
You want the most grip on dry roads
Michelin Pilot Sport 4 S scores 91 vs 86 on dry.
Tire A · Kumho Ecsta KU39
Tire B · Michelin Pilot Sport 4 S
More comparisons
Also compared with
Kumho Ecsta KU39 also compared with
Michelin Pilot Sport 4 S also compared with
How do we compare tires?
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.
Community buzz from Reddit and forums is shown for context only — it never changes the score.