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Head-to-head Updated

Bridgestone Potenza S001 RFT 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 79 + 485 owner reviews. How we score

Ecsta PS91 leads, 57–53 Narrow edge

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Kumho Ecsta PS91
Tire BKumho

Ecsta PS91

Summer

± 5

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.

  1. 54

    Dry

    Ecsta PS91 +12
    66
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score) · – / 6 tests≈ 59 (est.)77
    Reviews found online4651

    Potenza S001 RFT: 60% × 59 (est.) + 40% × 46.4 = 54

    Ecsta PS91: 60% × 76.7 + 40% × 51 = 66

    No road tests of dry for Potenza S001 RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 58

    Wet

    Ecsta PS91 +10
    68
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score) · – / 6 tests≈ 61 (est.)79
    Reviews found online5352

    Potenza S001 RFT: 60% × 60.9 (est.) + 40% × 52.8 = 58

    Ecsta PS91: 60% × 78.8 + 40% × 51.5 = 68

    No road tests of wet for Potenza S001 RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 42

    Snow

    Potenza S001 RFT +4
    38
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score)≈ 55 (est.)≈ 53 (est.)
    Reviews found online2215

    Potenza S001 RFT: 60% × 55.2 (est.) + 40% × 22 = 42

    Ecsta PS91: 60% × 53 (est.) + 40% × 15.1 = 38

    No road tests of snow for Potenza S001 RFT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

    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 0.32).

  4. 45

    Comfort

    Ecsta PS91 +9
    54
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score)≈ 62 (est.)≈ 64 (est.)
    Reviews found online3448

    Potenza S001 RFT: 40% × 61.6 (est.) + 60% × 33.7 = 45

    Ecsta PS91: 40% × 64.5 (est.) + 60% × 47.7 = 54

    No road tests of comfort for Potenza S001 RFT. 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 Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 61

    Noise

    Ecsta PS91 +1
    62
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score) · – / 3 tests≈ 66 (est.)70
    Reviews found online5250

    Potenza S001 RFT: 60% × 66.3 (est.) + 40% × 52 = 61

    Ecsta PS91: 60% × 70.2 + 40% × 49.5 = 62

    No road tests of noise for Potenza S001 RFT. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 58

    Treadwear

    Potenza S001 RFT +14
    44
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score)≈ 62 (est.)≈ 53 (est.)
    Reviews found online5330

    Potenza S001 RFT: 60% × 61.6 (est.) + 40% × 52.6 = 58

    Ecsta PS91: 60% × 53.5 (est.) + 40% × 30 = 44

    No road tests of treadwear for Potenza S001 RFT. 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 Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 48

    Handling (owners)

    Ecsta PS91 +5
    53
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Reviews found online4853
  8. –

    Efficiency

    No comparison
    47
    Why this score
    SourcePotenza S001 RFTEcsta PS91
    Professional tests (TWG score) · – / 3 tests–47
Scores at a glance
CategoryBridgestone Potenza S001 RFTKumho Ecsta PS91
Relative Score 53 57
Dry 54 66
Wet 58 68
Snow 42 38
Comfort 45 54
Noise 61 62
Treadwear 58 44
Handling (owners) 48 53
Efficiency – 47

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
± 7

Potenza S001 RFT

± 5

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 S001 RFT

Pros

  • Exceptional tread life and durability
  • Precise steering feedback and handling responsiveness
  • Strong dry-road grip

Cons

  • Poor wet-weather traction and hydroplaning resistance
  • High levels of road noise and cabin vibration
  • Harsh, stiff ride quality over road imperfections
All owner themes in the Potenza S001 RFT review

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
All owner themes in the Ecsta PS91 review

What real owners are saying

From Reddit, forums and review threads. Not part of our score

Tire A

Bridgestone Potenza S001 RFT

We haven't collected enough community discussion about this tire yet.

Tire B

Kumho Ecsta PS91

Mixed

The community views the Kumho Ecsta PS91 as an attractive, budget-friendly max performance summer tire that offers decent street traction, low noise, and a tread pattern resembling higher-end options like Michelin. However, opinions are split; while some drivers praise them as a great value alternative for daily driving and light spirited use, enthusiasts note limitations regarding rapid wear, subpar track endurance, and inferior grip compared to top-tier performance tires.

mustang6g.com ·2016-09-19

“Kuhmo Ecsta I had on a Mazda3 would flat spot overnite and vibrate like hell for 3-5miles til they warmed up. Hated them.”
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.”
bobistheoilguy.com ·2019-09-27

“I have the Ecsta PS91s on the Escape I just bought. They seem do be okay. The run smooth and seem to be quiet on most roads.”
Top themes
#Budget friendly pricing#Street performance and comfort#Tread wear and longevity#Track and grip limitations#Comparison to Michelin

Based on 46 community posts

Specs side by side

Attribute A · Bridgestone Potenza S001 RFT B · Kumho Ecsta PS91
CategorySummerSummer
Vehicle typePassenger Car / CrossoverPassenger Car / Crossover
Sizes available141
Rim diameters17″ – 21″19″
Tread depth9/32″9.5/32″
UTQG280 A A260 A A
SidewallBlackwallBlackwall
Max pressure51 psi50 psi

Which one should you actually buy?

Bridgestone Potenza S001 RFT

Kumho Ecsta PS91

Narrow edge: Kumho Ecsta PS91 — better dry, wet and comfort. Pick the Bridgestone Potenza S001 RFT if treadwear and snow matter most to you.

Pick tire A You want the longest tread life

Bridgestone Potenza S001 RFT scores 58 vs 44 on treadwear.

Pick tire B You want the most grip on dry roads

Kumho Ecsta PS91 scores 66 vs 54 on dry.

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 comfortable ride

Kumho Ecsta PS91 scores 54 vs 45 on comfort.

Tire A · Bridgestone Potenza S001 RFT
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Tire B · Kumho Ecsta PS91
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Potenza S001 RFT or Ecsta PS91?

Which is better in the wet, Potenza S001 RFT or Ecsta PS91?

Kumho Ecsta PS91, 68 vs 58 on our wet score.

Which grips better on dry roads, Potenza S001 RFT or Ecsta PS91?

Kumho Ecsta PS91, 66 vs 54 on our dry score.

Which is better in snow, Potenza S001 RFT or Ecsta PS91?

Bridgestone Potenza S001 RFT, 42 vs 38 on our snow score.

Which is quieter, Potenza S001 RFT or Ecsta PS91?

Neither, by our numbers: 61 vs 62 on the noise score, within 3 points.

Which is more comfortable, Potenza S001 RFT or Ecsta PS91?

Kumho Ecsta PS91, 54 vs 45 on our comfort score.

Which lasts longer, Potenza S001 RFT or Ecsta PS91?

Bridgestone Potenza S001 RFT, 58 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