Pilot Sport 4 SUV
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Specifications
| Size | 315/35R21 XL Pilot Sport 4 Suv Run Flat |
|---|---|
| Width | 315 mm |
| Aspect ratio | 35 |
| Rim diameter | R21 |
| Load index | 111 |
| Speed rating | Y |
| Load range | XL |
| Season | Summer |
|---|---|
| Treadwear warranty | 20,000 miles |
| Tread depth | 9/32" |
| Weight | 40.6 lbs |
| Max pressure | 50 psi |
| Severe snow (3PMSF) | No |
| Run-flat | Yes |
About the Michelin Pilot Sport 4 SUV
Summer Ultra High Performance Passenger Car tire.
Features
* Asymmetrical tread pattern - external part for dry conditions, internal part for wet roads* Rigid blocks on the tread pattern* High density double casing* Hybrid belt made of aramid and nylon* Premium Touch finish sidewall design* Deep rim protector* 20,000 Mile/30,000 km Manufacturer's Treadwear Limited Warranty (Speed Rating: Y,W,V,H)* Standard Manufacturer's Limited Warranty
Benefits
* For outstanding grip and safety* Optimized for longevity* For tire robustness* Help protect the sidewall and steel belts* Provides a dark velvet effect on the external sidewall* Guards against light wheel damage
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 Michelin Pilot Sport 4 SUV is built for
The Michelin Pilot Sport 4 SUV is a summer tire, tuned for maximum dry and wet grip in warm conditions; it is not intended for near-freezing temperatures. Run-flat construction lets you keep driving a limited distance at reduced speed after a loss of pressure. Fitment category: Passenger Car, SUV/CUV, Performance, UHP.
Price and value
At $476.24 per tire, a full set of four costs $1904.96. That is about 15% above the average of the 26 tires we stock in this size, reflecting its position in the range. Backed by a 20,000-mile treadwear warranty, that works out to roughly $95.25 per 1,000 miles across the set.
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 Michelin Pilot Sport 4 SUV 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 Michelin Pilot Sport 4 SUV 315/35R21 XL tires cost?
A single tire is $476.24 and a set of four is $1904.96, covered by a 20,000-mile treadwear warranty.
Can the Michelin Pilot Sport 4 SUV 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.
Is the Michelin Pilot Sport 4 SUV a run-flat tire?
Yes. Run-flat construction supports the vehicle for a limited distance at reduced speed after a loss of air pressure, so you can reach a service point without an immediate roadside change.
Does the Pilot Sport 4 SUV come in other sizes?
Yes — we stock 89 additional Pilot Sport 4 SUV sizes besides 315/35R21 XL. Fit only a size approved for your vehicle.