Michelin Pilot Sport 4 SUV 315/40ZR21 XL Pilot Sport 4 Suv
Michelin

Pilot Sport 4 SUV

315/40ZR21 XL
Summer
$471.74/tire $628.99
Set of 4: $1886.96
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.
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Specifications

Size315/40ZR21 XL Pilot Sport 4 Suv
Width315 mm
Aspect ratio40
Rim diameterR21
Load index115
Speed rating(Y)
Load rangeXL
SeasonSummer
Treadwear warranty20,000 miles
Tread depth9/32"
Weight33.84 lbs
Max pressure50 psi
Severe snow (3PMSF)No
Run-flatNo

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 315/40ZR21 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 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. Fitment category: Passenger Car, SUV/CUV, Performance, UHP.

Price and value

At $471.74 per tire, a full set of four costs $1886.96. That is about 14% above the average of the 29 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 $94.35 per 1,000 miles across the set.

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 Michelin Pilot Sport 4 SUV 315/40ZR21 XL?

Its load index of 115 allows up to 2,679 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 315/40ZR21 XL tires cost?

A single tire is $471.74 and a set of four is $1886.96, 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.

Does the Pilot Sport 4 SUV come in other sizes?

Yes — we stock 89 additional Pilot Sport 4 SUV sizes besides 315/40ZR21 XL. Fit only a size approved for your vehicle.

Other sizes of this model

Similar tires in 315/40R21

Pirelli Pzero (PZ4) 315/40R21 Pzero (PZ4-Sport) (Mo-S) NCS
Pirelli
Pzero (PZ4)
315/40R21
$407.90/tire
$1631.60 set of 4
Pirelli Pzero (PZ4) 315/40ZR21 XL Pzero (PZ4-Sport) (NC0)
Pirelli
Pzero (PZ4)
315/40ZR21 XL
Summer
$514.11/tire
$2056.44 set of 4
Pirelli Scorpion Winter 315/40R21 XL Scorpion Winter
Pirelli
Scorpion Winter
315/40R21 XL
Winter 3PMSF
$490.19/tire
$1960.76 set of 4
Pirelli Scorpion Winter 315/40R21 XL Scorpion Winter (MO1)
Pirelli
Scorpion Winter
315/40R21 XL
Winter 3PMSF
$407.90/tire
$1631.60 set of 4
Pirelli Scorpion Winter 315/40R21 XL Scorpion Winter (A8A)
Pirelli
Scorpion Winter
315/40R21 XL
Winter 3PMSF
$500.00/tire
$2000.00 set of 4