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Hankook
Ventus S1 EVO 4 X K137A
315/35R21 XL
Summer
$345.74/tire
$460.99
Set of 4: $1382.96
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Specifications
| Size | 315/35R21 XL Ventus S1 Evo 4 X K137A (*) |
|---|---|
| Width | 315 mm |
| Aspect ratio | 35 |
| Rim diameter | R21 |
| Load index | 111 |
| Speed rating | Y |
| Load range | XL |
| Season | Summer |
|---|---|
| UTQG | 200 A A |
| Tread depth | 7.5/32" |
| Weight | 36.5 lbs |
| Max pressure | 50 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the Hankook Ventus S1 EVO 4 X K137A
Summer Ultra High Performance Passenger Car/SUV tire. Original Equipment on BMW X5 PHEV.
Understanding the 315/35R21 XL size
In the size code 315/35R21, 315 is the section width in millimetres (about 12.4"). 35 is the aspect ratio — the sidewall height is 35% of the width, or roughly 110.3 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 29.7".
The load index 111 means each tire supports up to 2,403 lbs — about 9,612 lbs across a full set of four. The speed symbol Y certifies the tire to 186 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.
What the Hankook Ventus S1 EVO 4 X K137A is built for
The Hankook Ventus S1 EVO 4 X K137A is a summer tire, tuned for maximum dry and wet grip in warm conditions; it is not intended for near-freezing temperatures. Fitment category: Passenger Car, SUV/CUV, Performance, UHP.
Tread life and grip ratings
This tire carries a UTQG rating of 200 A A. The treadwear grade of 200 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).
Price and value
At $345.74 per tire, a full set of four costs $1382.96. That is about 16% below the average price of the 26 tires we stock in this size.
Frequently asked questions
What does the tire size 315/35R21 mean?
315 is the section width in millimetres, 35 is the aspect ratio (sidewall height as a percentage of width, about 110.3 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 29.7 inches.
What are the load and speed ratings of the Hankook Ventus S1 EVO 4 X K137A 315/35R21 XL?
Its load index of 111 allows up to 2,403 lbs per tire. Its speed rating of Y is certified to 186 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.
How much does a set of 4 Hankook Ventus S1 EVO 4 X K137A 315/35R21 XL tires cost?
A single tire is $345.74 and a set of four is $1382.96.
Can the Hankook Ventus S1 EVO 4 X K137A be used in winter?
No. This is a summer tire and it is not rated for severe snow service. Its compound stiffens as temperatures approach freezing, so fit winter or all-weather tires for cold-season driving.
Does the Ventus S1 EVO 4 X K137A come in other sizes?
Yes — we stock 3 additional Ventus S1 EVO 4 X K137A sizes besides 315/35R21 XL. Fit only a size approved for your vehicle.
Other sizes of this model
Similar tires in 315/35R21
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