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.
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Prices change daily — check the retailer for your size.
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Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tire Rack owners | 91 | – |
| Tyre Reviews owners | 87 | 76 |
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tire Rack owners | 71 | – |
| Tyre Reviews owners | 72 | 75 |
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tyre Reviews owners | – | 75 |
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tire Rack owners | 75 | – |
| Tyre Reviews owners | 61 | 83 |
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tire Rack owners | 87 | – |
| Tyre Reviews owners | 86 | 78 |
| Source | Ventus R-S4 | IZen KW27 |
|---|---|---|
| Tyre Reviews owners | 88 | 69 |
| Category | Hankook Ventus R-S4 | Kumho IZen KW27 |
|---|---|---|
| Relative Score | 79 | 76 |
| Dry | 87 | 76 |
| Wet | 72 | 75 |
| Snow | – | 75 |
| Comfort | 61 | 83 |
| Treadwear | 86 | 78 |
| Handling | 88 | 69 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
Tire A
Tire B
Only categories both tires have data for count toward the headline score.
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
The Hankook Ventus RS4 is widely regarded as the industry benchmark for endurance-focused extreme performance summer tires. While it may not offer the absolute peak grip of specialized autocross tires, it is highly praised for its exceptional tread life, heat consistency, and value, making it a favorite for HPDE participants and endurance racers.
The Kumho IZen KW27 is a polarizing winter tire that excels in deep snow and ice, often surprising users with its durability and traction in severe conditions. However, it receives significant criticism for its performance in wet, slushy, or warmer winter conditions, where many drivers report a 'floaty' handling feel, reduced steering feedback, and a tendency for the vehicle to lose traction.
| Attribute | A · Hankook Ventus R-S4 | B · Kumho IZen KW27 |
|---|---|---|
| Category | — | Winter High Performance tires |
| Vehicle type | — | Passenger Car / Crossover |
Hankook
Kumho
Winner: Hankook Ventus R-S4 — better handling, dry and treadwear. Pick the Kumho IZen KW27 if comfort and wet matter most to you.
Kumho IZen KW27 scores 83 vs 61 on comfort.
Hankook Ventus R-S4 scores 88 vs 69 on handling.
Hankook Ventus R-S4 scores 87 vs 76 on dry.
Hankook Ventus R-S4 scores 86 vs 78 on treadwear.
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.
