Tests – · none yet Owners 45 · 19 reviews
Head-to-head
Updated
Bridgestone Potenza S007 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 19 + 485 owner reviews. How we score
Ecsta PS91 is ahead, 61–54
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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.
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58
Dry
Ecsta PS91 +967Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) · – / 6 tests ≈ 61 (est.) 77 Reviews found online 52 52 Potenza S007: 60% × 61.4 (est.) + 40% × 52.2 = 58
Ecsta PS91: 60% × 76.7 + 40% × 51.6 = 67
No road tests of dry for Potenza S007. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).
-
58
Wet
Ecsta PS91 +1068Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) · – / 6 tests ≈ 61 (est.) 79 Reviews found online 54 52 Potenza S007: 60% × 61.3 (est.) + 40% × 53.6 = 58
Ecsta PS91: 60% × 79 + 40% × 52 = 68
No road tests of wet for Potenza S007. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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–
Snow
No comparison36Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) – ≈ 50 (est.) Reviews found online – 16 Ecsta PS91: 60% × 50.1 (est.) + 40% × 15.7 = 36
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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48
Comfort
Ecsta PS91 +755Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) ≈ 63 (est.) ≈ 65 (est.) Reviews found online 37 49 Potenza S007: 40% × 63.4 (est.) + 60% × 37.4 = 48
Ecsta PS91: 40% × 65.4 (est.) + 60% × 48.5 = 55
No road tests of comfort for Potenza S007 or Ecsta PS91. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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–
Noise
No comparison62Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) · – / 3 tests – 70 Reviews found online – 50 Ecsta PS91: 60% × 70.2 + 40% × 50.1 = 62
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45
Treadwear
Potenza S007 +144Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) ≈ 54 (est.) ≈ 53 (est.) Reviews found online 31 30 Potenza S007: 60% × 53.8 (est.) + 40% × 31 = 45
Ecsta PS91: 60% × 53.4 (est.) + 40% × 29.9 = 44
No road tests of treadwear for Potenza S007. 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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50
Handling (owners)
Ecsta PS91 +454Why this score
Source Potenza S007 Ecsta PS91 Reviews found online 50 54 -
–
Efficiency
No comparison48Why this score
Source Potenza S007 Ecsta PS91 Professional tests (TWG score) · – / 3 tests – 48
Scores at a glance
| Category | Bridgestone Potenza S007 | Kumho Ecsta PS91 |
|---|---|---|
| Relative Score | 54 | 61 |
| Dry | 58 | 67 |
| Wet | 58 | 68 |
| Snow | – | 36 |
| Comfort | 48 | 55 |
| Noise | – | 62 |
| Treadwear | 45 | 44 |
| Handling (owners) | 50 | 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
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
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
54
/ 100
Potenza S007
61
/ 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 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
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 S007
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.
r/e46
·39 upvotes ·2025-03-26
“New wheels and tires for my ZHP My old wheels were super beat up and tires were showing wire so I figured I’d upgrade both. Was able to get these freshly powder coated squared set (18/8.5/et 50). Im excited to feel the Kuhmo Ecsta PS91 as they are a budget friendly performance tire. 255/35/18 tires all around”
s197forum.com
·2017-03-29
“I've only got a couple thousand on them and just spirited driving in the mountains. I think they will easily go over 10k even with a few track events. I am thinking about getting a set for my SVT focus as I autoX with that car, much easier to drive at the limit than a turbocharged S197.”
chargerhellcat.org
·2020-06-08
“I have the XTS variant of this tyre on my Ram srt10 and the drive nicely and don’t tramline.”
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 S007 | B · Kumho Ecsta PS91 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | 12 | 1 |
| Rim diameters | 17″ – 20″ | 19″ |
| Tread depth | — | 9.5/32″ |
| UTQG | — | 260 A A |
| Sidewall | — | Blackwall |
| Max pressure | — | 50 psi |
Which one should you actually buy?
54
/ 100
Bridgestone Potenza S007
61
/ 100
Kumho Ecsta PS91
Winner: Kumho Ecsta PS91 — better wet, dry and comfort. Where the Bridgestone Potenza S007 is ahead, it is by less than 3 points. Bridgestone Potenza S007 rests on little evidence so far (0 tests, 19 reviews), so read this result as provisional.
Pick tire B
Your priority is wet-weather safety
Kumho Ecsta PS91 scores 68 vs 58 on wet.
Pick tire B
You want the most grip on dry roads
Kumho Ecsta PS91 scores 67 vs 58 on dry.
Pick tire B
You want the most comfortable ride
Kumho Ecsta PS91 scores 55 vs 48 on comfort.
Tire A · Bridgestone Potenza S007
Tire B · Kumho Ecsta PS91
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Potenza S007 or Ecsta PS91?
Which is better in the wet, Potenza S007 or Ecsta PS91?
Kumho Ecsta PS91, 68 vs 58 on our wet score.
Which grips better on dry roads, Potenza S007 or Ecsta PS91?
Kumho Ecsta PS91, 67 vs 58 on our dry score.
Which is more comfortable, Potenza S007 or Ecsta PS91?
Kumho Ecsta PS91, 55 vs 48 on our comfort score.
Which lasts longer, Potenza S007 or Ecsta PS91?
Neither, by our numbers: 45 vs 44 on the treadwear score, within 3 points.
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