Tests – · none yet Owners 60 · 20 reviews
Head-to-head
Updated
Bridgestone Potenza S-02 vs Kumho Ecsta PS91 — 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 + 6 road tests and 20 + 485 owner reviews. How we score
Potenza S-02 is ahead, 64–57
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Tests 77 · 6 tests Owners 42 · 485 reviews
Best test result: #1 of 11 in 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 (exterior noise)
“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”
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
68
Dry
Potenza S-02 +167Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) · – / 6 tests ≈ 68 (est.) 77 Reviews found online 68 52 Potenza S-02: 60% × 68.1 (est.) + 40% × 68.2 = 68
Ecsta PS91: 60% × 76.7 + 40% × 51.6 = 67
No road tests of dry for Potenza S-02. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).
-
66
Wet
Ecsta PS91 +268Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) · – / 6 tests ≈ 67 (est.) 79 Reviews found online 65 52 Potenza S-02: 60% × 67.4 (est.) + 40% × 64.7 = 66
Ecsta PS91: 60% × 79 + 40% × 51.9 = 68
No road tests of wet for Potenza S-02. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
-
61
Snow
Potenza S-02 +2536Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) ≈ 65 (est.) ≈ 50 (est.) Reviews found online 55 16 Potenza S-02: 60% × 64.8 (est.) + 40% × 54.7 = 61
Ecsta PS91: 60% × 50.2 (est.) + 40% × 15.7 = 36
No road tests of snow for Potenza S-02. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).
No road tests of snow for Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).
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58
Comfort
Potenza S-02 +355Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) ≈ 66 (est.) ≈ 65 (est.) Reviews found online 52 49 Potenza S-02: 40% × 66 (est.) + 60% × 52.3 = 58
Ecsta PS91: 40% × 65.3 (est.) + 60% × 48.5 = 55
No road tests of comfort for Potenza S-02 or Ecsta PS91. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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62
Noise
Level62Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) · – / 3 tests ≈ 67 (est.) 70 Reviews found online 54 50 Potenza S-02: 60% × 66.6 (est.) + 40% × 54.3 = 62
Ecsta PS91: 60% × 70.2 + 40% × 50.2 = 62
No road tests of noise for Potenza S-02. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
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57
Treadwear
Potenza S-02 +1344Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) ≈ 61 (est.) ≈ 54 (est.) Reviews found online 51 30 Potenza S-02: 60% × 60.8 (est.) + 40% × 50.9 = 57
Ecsta PS91: 60% × 53.5 (est.) + 40% × 29.9 = 44
No road tests of treadwear for Potenza S-02. 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 Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).
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71
Handling (owners)
Potenza S-02 +1754Why this score
Source Potenza S-02 Ecsta PS91 Reviews found online 71 54 -
–
Efficiency
No comparison48Why this score
Source Potenza S-02 Ecsta PS91 Professional tests (TWG score) · – / 3 tests – 48
Scores at a glance
| Category | Bridgestone Potenza S-02 | Kumho Ecsta PS91 |
|---|---|---|
| Relative Score | 64 | 57 |
| Dry | 68 | 67 |
| Wet | 66 | 68 |
| Snow | 61 | 36 |
| Comfort | 58 | 55 |
| Noise | 62 | 62 |
| Treadwear | 57 | 44 |
| Handling (owners) | 71 | 54 |
| Efficiency | – | 48 |
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
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
64
/ 100
Potenza S-02
57
/ 100
Ecsta PS91
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 Potenza S-02
Pros
- Exceptional dry grip and superior cornering performance
- Outstanding steering feedback, communication, and progressiveness
- Faithful reproduction of original equipment (OE) handling characteristics for sports cars like the Honda S2000
Cons
- Very rapid and sometimes extreme tread wear
- Poor performance and loss of traction in cold weather or below certain temperatures
- High noise levels and stiff ride compromising comfort
Tire B 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
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Bridgestone Potenza S-02
We haven't collected enough community discussion about this tire yet.
Tire B
Mixed
Kumho Ecsta PS91
The Kumho Ecsta PS91 is widely praised as an affordable, budget-friendly summer tire with attractive styling and respectable wet or daily street performance compared to pricier rivals like Michelin. However, several users express frustration with poor tread life, rapid wear, and insufficient grip or heat endurance under hard driving and track conditions. Others also note issues with sketchy handling, flat-spotting, or vibration when cold.
mbworld.org
“They are actually good tires. I used to have them, they have decent wet/dry traction which is good right now since its raining.”
mustang6g.com
·1 upvote ·2017-01-05
“They were good enough for 1:46.708 at Mazda Laguna Seca 285/35ZR-19 Actually, thats better than I thought”
r/e46
·222 upvotes ·2025-03-27
“Follow up on new wheels/tires for ZHP Well new wheels and tires are on aswell as aligned. I love the tire and fitment setup but really do not like the gunmetal grey color especially on imola. I will feel it out for a while but probably eventually powder coat to OEM silver. Wheels specs are 18 x 8.5 x ET50 with 255/35/18 Kuhmo Ecsta PS91 all around. -2.5 camber in the front and -2.8 in the rear.”
Top themes
#budget performance value#rapid tread wear#wet and dry traction#track and heat limitations#ride quality and appearance#Michelin alternative comparison
Based on 45 community posts
Specs side by side
| Attribute | A · Bridgestone Potenza S-02 | B · Kumho Ecsta PS91 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Tread depth | 10/32″ | 9.5/32″ |
| UTQG | 140 A A | 260 A A |
| Sidewall | Blackwall | Blackwall |
| Max pressure | — | 50 psi |
Which one should you actually buy?
64
/ 100
Bridgestone Potenza S-02
57
/ 100
Kumho Ecsta PS91
Winner: Bridgestone Potenza S-02 — better snow, handling and treadwear. Where the Kumho Ecsta PS91 is ahead, it is by less than 3 points.
Pick tire A
You drive through snowy winters
Bridgestone Potenza S-02 scores 61 vs 36 on snow.
Pick tire A
You enjoy sharp, responsive handling
Bridgestone Potenza S-02 scores 71 vs 54 on handling.
Pick tire A
You want the longest tread life
Bridgestone Potenza S-02 scores 57 vs 44 on treadwear.
Pick tire A
You want the most comfortable ride
Bridgestone Potenza S-02 scores 58 vs 55 on comfort.
Tire A · Bridgestone Potenza S-02
Tire B · Kumho Ecsta PS91
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Potenza S-02 or Ecsta PS91?
Which is better in the wet, Potenza S-02 or Ecsta PS91?
Neither, by our numbers: 66 vs 68 on the wet score, within 3 points.
Which grips better on dry roads, Potenza S-02 or Ecsta PS91?
Neither, by our numbers: 68 vs 67 on the dry score, within 3 points.
Which is better in snow, Potenza S-02 or Ecsta PS91?
Bridgestone Potenza S-02, 61 vs 36 on our snow score.
Which is quieter, Potenza S-02 or Ecsta PS91?
Neither, by our numbers: 62 vs 62 on the noise score, within 3 points.
Which is more comfortable, Potenza S-02 or Ecsta PS91?
Bridgestone Potenza S-02, 58 vs 55 on our comfort score.
Which lasts longer, Potenza S-02 or Ecsta PS91?
Bridgestone Potenza S-02, 57 vs 44 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