Tests 76 · 6 tests Owners 47 · 485 reviews
“Putting some Kumho Ecsta PS91s on. Curious how they’ll do since my go to Falken rt660 doesn’t come in the oem 18” sizes”
Head-to-head
Updated
Kumho Ecsta PS91 vs Bridgestone Potenza S007 — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Ecsta PS91 leads, 61–58 Narrow edge
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Tests – · none yet Owners 52 · 19 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
68
Dry
Ecsta PS91 +662Why this score
Source Ecsta PS91 Potenza S007 Professional tests (TWG score) 75 – Reviews found online 57 58 -
68
Wet
Ecsta PS91 +761Why this score
Source Ecsta PS91 Potenza S007 Professional tests (TWG score) 77 – Reviews found online 55 58 -
38
Snow
No comparison–Why this score
Source Ecsta PS91 Potenza S007 Reviews found online 17 – -
61
Comfort
Ecsta PS91 +457Why this score
Source Ecsta PS91 Potenza S007 Reviews found online 53 45 -
67
Noise
No comparison–Why this score
Source Ecsta PS91 Potenza S007 Professional tests (TWG score) 76 – Reviews found online 54 – -
49
Treadwear
Potenza S007 +352Why this score
Source Ecsta PS91 Potenza S007 Reviews found online 37 42 -
57
Handling
Ecsta PS91 +354Why this score
Source Ecsta PS91 Potenza S007 Reviews found online 57 54
Scores at a glance
| Category | Kumho Ecsta PS91 | Bridgestone Potenza S007 |
|---|---|---|
| Relative Score | 61 | 58 |
| Dry | 68 | 62 |
| Wet | 68 | 61 |
| Snow | 38 | – |
| Comfort | 61 | 57 |
| Noise | 67 | – |
| Treadwear | 49 | 52 |
| Handling | 57 | 54 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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.
Important
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Important
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Neutral
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Neither tire has a score here yet, so this weight changes nothing.
Less important
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Less important
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Neither tire has a score here yet, so this weight changes nothing.
Important
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Neutral
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Recomputed
Headline score
61
/ 100
Ecsta PS91
58
/ 100
Potenza S007
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 Ecsta PS91
Pros
- Exceptional dry and wet grip providing high confidence during spirited driving
- Significantly more affordable than premium flagship alternatives while offering comparable performance
- Stiff sidewalls enhance steering response, cornering stability, and feedback
Cons
- Accelerated tread wear and shorter lifespan, particularly with aggressive driving or on heavier vehicles
- Stiff sidewalls result in a firmer, less comfortable ride that transmits road imperfections
- Tendency to tramline or follow road grooves on straight highways
Tire B Potenza S007
Pros
- Exceptional dry grip and traction under heavy acceleration and high horsepower
- Precise handling and cornering stability in warm weather
- Suitable for occasional track use and aggressive driving
Cons
- Poor wet weather performance, with multiple reports of severe aquaplaning and lack of confidence on damp roads
- Rapid and premature tread wear, with some users experiencing wear out in under 10,000 miles
- Stiff ride quality and noticeable road noise on rough surfaces
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Mixed
Kumho Ecsta PS91
Community opinion on the Kumho Ecsta PS91 is generally mixed, praising them as a budget-friendly, good-looking max performance summer tire that rivals premium brands in daily driving comfort and appearance. However, multiple users note concerns regarding rapid tread wear, poor heat capacity under track conditions, and susceptibility to degrading under hard abuse compared to dedicated 200 treadwear or extreme performance tires.
r/E90
·180 upvotes ·2025-09-17
“New meaty tires set up installed, now I can order spacers Went up tire sizes and they definitely fill the gap a bit. First time running sticky kumhos on anytime so excited to see how they turn out.Specs are Kumho Ecsta Ps91 235/40/18 up front and 265/40/18 in the rear. Read more”
r/Autocross
·1 upvote ·2025-09-30
“You will get smoked if you go with the PS91. They also do not hold well under abuse. I feel that the RE-71RS would be a better value for you simply because they'll hold and remain consistent even as they wear very far down. I've used the RE-71RS at a track day before and even as the tires were chunking and melting, they still maintained their grip, as if they were just BEGGING to be abused, to see how far they could be pushed.”
r/Mustang
·1 upvote ·2024-01-31
“no more Kumho Ecsta PS91 for me I have 2015 Mustang GT Premium with 20" wheels. I bought the car new, and it has just over 155k, and the only thing I have replaced is the water pump. However, tire wear is a problem. The alignment is good, and I had the camber adjusted (front and rear) so that the tire has less negative camber than it had when it left the factory. Despite that, I'm only getting about 15k miles out of a set, and I drive it very gently. I've been buying Kumho Ecsta PS91, but I'd like to try something different. What do you recommend?”
Top themes
#budget friendly performance#ride quality and comfort#tread wear longevity#track and heat performance#tire mixing risks#fitment and appearance
Based on 16 community posts
Tire B
Bridgestone Potenza S007
We haven't collected enough community discussion about this tire yet.
Specs side by side
| Attribute | A · Kumho Ecsta PS91 | B · Bridgestone Potenza S007 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | 1 | 12 |
| Rim diameters | 19″ | 17″ – 20″ |
| Tread depth | 9.5/32″ | — |
| UTQG | 260 A A | — |
| Sidewall | Blackwall | — |
| Max pressure | 50 psi | — |
Which one should you actually buy?
61
/ 100
Kumho Ecsta PS91
58
/ 100
Bridgestone Potenza S007
Winner: Kumho Ecsta PS91 — better wet, dry and comfort. Pick the Bridgestone Potenza S007 if treadwear matters most to you.
Pick tire A
Your priority is wet-weather safety
Kumho Ecsta PS91 scores 68 vs 61 on wet.
Pick tire A
You want the most grip on dry roads
Kumho Ecsta PS91 scores 68 vs 62 on dry.
Pick tire A
You want the most comfortable ride
Kumho Ecsta PS91 scores 61 vs 57 on comfort.
Pick tire A
You enjoy sharp, responsive handling
Kumho Ecsta PS91 scores 57 vs 54 on handling.
Tire A · Kumho Ecsta PS91
Tire B · Bridgestone Potenza S007
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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.
Community buzz from Reddit and forums is shown for context only — it never changes the score.