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Hankook
ION Supreme AS SUV (IH31A)
315/40R21 XL
$403.49/tire
$537.99
Set of 4: $1613.96
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Specifications
| Size | 315/40R21 XL Ion Supreme AS Suv (IH31A) |
|---|---|
| Width | 315 mm |
| Aspect ratio | 40 |
| Rim diameter | R21 |
| Load index | 115 |
| Speed rating | V |
| Load range | XL |
| Tread depth | 8.5/32" |
|---|---|
| Weight | 40.1 lbs |
| Max pressure | 50 psi |
| Severe snow (3PMSF) | No |
| Run-flat | No |
About the Hankook ION Supreme AS SUV (IH31A)
All-Season Highway-Terrain Passenger SUV Tire for Electric Vehicles.
Understanding the 315/40R21 XL size
In the size code 315/40R21, 315 is the section width in millimetres (about 12.4"). 40 is the aspect ratio — the sidewall height is 40% of the width, or roughly 126 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 30.9".
The load index 115 means each tire supports up to 2,679 lbs — about 10,716 lbs across a full set of four. The speed symbol V certifies the tire to 149 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 ION Supreme AS SUV (IH31A) is built for
Fitment category: Passenger Car, SUV/CUV.
Price and value
At $403.49 per tire, a full set of four costs $1613.96. That sits close to the average for the 29 tires we stock in this size.
Frequently asked questions
What does the tire size 315/40R21 mean?
315 is the section width in millimetres, 40 is the aspect ratio (sidewall height as a percentage of width, about 126 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 30.9 inches.
What are the load and speed ratings of the Hankook ION Supreme AS SUV (IH31A) 315/40R21 XL?
Its load index of 115 allows up to 2,679 lbs per tire. Its speed rating of V is certified to 149 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 ION Supreme AS SUV (IH31A) 315/40R21 XL tires cost?
A single tire is $403.49 and a set of four is $1613.96.
Does the ION Supreme AS SUV (IH31A) come in other sizes?
Yes — we stock 1 additional ION Supreme AS SUV (IH31A) size besides 315/40R21 XL. Fit only a size approved for your vehicle.
Other sizes of this model
Similar tires in 315/40R21
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