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Michelin Pilot Sport 4S
Upgrade to the Michelin Pilot Sport 4S 245/40R21 100Y XL BSW, a max-performance summer tire built for drivers who want precise steering, exceptional dry grip, confident wet braking, and road-to-occasional-track capability. This 245/40R21 Pilot Sport 4S is a popular fitment for select Lexus IS, Genesis G70, Cadillac CT4-V, Ford Mustang, Chevrolet Camaro, Dodge Challenger models, plus similar sports cars, performance sedans, premium EVs, and high-output SUVs using 21-inch wheels.
Why choose the Michelin Pilot Sport 4S in 245/40R21?
Built for sport sedans, grand touring cars, premium EVs, and performance crossovers: The 100Y XL service description adds extra load capacity for performance trims, larger wheels, staggered packages, passengers, and high-speed driving.
Road and occasional track performance: Michelin positions the Pilot Sport 4S for approximately 80% road and 20% track use, making it a strong match for spirited street driving and occasional performance events.
Dynamic Response Technology: The tire is engineered for ultra-precise steering response, strong cornering power, and connected handling at high speed.
Multi-Compound Construction: Michelin uses a performance-focused tread design to help deliver dry grip, wet braking, and consistent control where drivers need it most.
Premium performance pedigree: The Pilot Sport 4S is derived from the Pilot Super Sport and is acclaimed by performance manufacturers such as Mercedes-AMG, Ferrari, and Porsche.
Popular vehicle fitments for 245/40R21 Michelin Pilot Sport 4S
This tire size is commonly used on select trims or staggered applications of the Lexus IS, Genesis G70, Cadillac CT4-V, Ford Mustang, Chevrolet Camaro, and Dodge Challenger. It is also a strong option for comparable performance vehicles that use the same tire size, load rating, speed rating, wheel diameter, and any applicable OE marking.
Size and rating details
245/40R21: This size is designed for 21-inch wheels and is a practical choice for sport sedan, grand touring, EV, and performance crossover fitments that need summer handling with daily usability.
100Y XL: The service description and load range identify the tire's load capacity and speed capability for the intended performance application.
BSW: This version uses black sidewall styling for a clean performance look.
Speed capability: This size carries Y-rated speed capability for high-performance summer driving.
| SECTION WIDTH Measures the width of the tire from sidewall to sidewall, which is mounted on a wheel and inflated. | 245 |
| ASPECT RATIO Determines the sidewall height of the tire, based on the width. | 40 |
| RIM DIAMETER Measures the rim size from top to bottom (in inches). | 21" |
| OVERALL DIAMETER Measures the tire height from top to bottom when mounted on a wheel and inflated. | 28.7" |
| RIM WIDTH RANGE The approved range of rim widths this tire can be safely mounted on. | 8.0" - 9.5" |
| WEIGHT The weight of the tire measured in pounds (weight of tire only). | 29.12 LBS |
| TREAD DEPTH Measured in /32 of an inch to determine the height of the tread block from top to bottom. | 9/32" |
| LOAD INDEX Determines the weight a tire can carry at maximum air pressure. See load Index chart. | 100 |
| LOAD RANGE Determines the ply rating of the tire. Should be replaced with the same or higher rating. | XL |
| MAX PSI The max psi is the highest pressure the tire can hold, but should be inflated to your vehicle specifications not exceeding this amount. | 50 PSI |
| SPEED RATING Designation from laboratory testing to determine the maximum speed the tire can travel. Maintain the same speed rating or higher for replacement. | Up to 186 mph |
| SIDEWALL DESC. The sidewall designation to describe the lettering on the sidewall. | Black Side Wall |
| WARRANTY Estimates the life expectancy of the tire, set by the tire manufacturer. | 30000 |
| VPN Vendor Product Number | 58210 |
| GTIN Global Trade Item Number | 086699582102 |
Customer Reviews
I run the Michelin Pilot 4S on my Porsche GT3 and my Cayman S. I use Pilot all season 4S on my 1979 Porsche 930. I drive all three cars up at Atlanta Motorsports Park on the track as I’m a member and a driving instructor there. These tires handle amazing in wet or dry conditions and in my opinion are the best tire Michelin has developed in a long time. I look at all of the various sports cars on pit lane and I would have to say 60-70% are using this tire. Discount Tire did an amazing job mounting and balancing them when I purchased them from them and their pricing and level of customer service was top notch. I will continue to use Discount Tire for all of my future tire needs.
My PS2's from day one were bad at tramlining. All suspenion parts are in perfect condition. The PS2's were 5 years old and became slippery as they aged. These new tires are grippy and smooth on rutted roadways. Glad I got them.
Great tires I have same set on another car