Michelin Pilot Sport 4 SUV 315/35R21 XL Pilot Sport 4 Suv Run Flat
Michelin

Pilot Sport 4 SUV

315/35R21 XL
Summer Run-flat
$476.24/tire $634.99
Set of 4: $1904.96
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
Visa Mastercard American Express Shipped with DHL

🚚 Standard shipping across the country — delivered with DHL in 2-6 business days. 🔒 SSL-secured checkout.

↩️ Free returns within 30 days — unmounted tires, prepaid label, no return shipping cost.

Specifications

Size315/35R21 XL Pilot Sport 4 Suv Run Flat
Width315 mm
Aspect ratio35
Rim diameterR21
Load index111
Speed ratingY
Load rangeXL
SeasonSummer
Treadwear warranty20,000 miles
Tread depth9/32"
Weight40.6 lbs
Max pressure50 psi
Severe snow (3PMSF)No
Run-flatYes

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.

Other sizes of this model

Similar tires in 315/35R21

Pirelli Pzero (PZ4) 315/35R21 XL Pzero (PZ4-Luxury) (*) Runflat
Pirelli
Pzero (PZ4)
315/35R21 XL
$417.70/tire
$1670.80 set of 4
Pirelli Pzero (PZ4) 315/35ZR21 XL Pzero (PZ4-Sport) (*)
Pirelli
Pzero (PZ4)
315/35ZR21 XL
$412.55/tire
$1650.20 set of 4
Pirelli Pzero (PZ4) 315/35R21 XL Pzero (PZ4-Sport) (*) (KS) NCS
Pirelli
Pzero (PZ4)
315/35R21 XL
$418.37/tire
$1673.48 set of 4
Pirelli Pzero (PZ4) 315/35R21 XL Pzero (PZ4-Sport) (*) (K1) ELT
Pirelli
Pzero (PZ4)
315/35R21 XL
Summer
$427.27/tire
$1709.08 set of 4