Free shipping on all products delivered to store of your choice
Extend the life of your tires with an alignment. Free inspections!
product info
Michelin Pilot Sport 4S
Shop the Michelin Pilot Sport 4S 305/30R21 104Y XL BSW MW, 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 305/30R21 Pilot Sport 4S is a popular fitment for select Maserati MC20, Ferrari Roma, Alfa Romeo Giulia Quadrifoglio, Maserati GranTurismo, Maserati Ghibli, Maserati Quattroporte 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 305/30R21?
Built for sports cars, high-horsepower coupes, and staggered performance applications: The 104Y 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 305/30R21 Michelin Pilot Sport 4S
This tire size is commonly used on select trims or staggered applications of the Maserati MC20, Ferrari Roma, Alfa Romeo Giulia Quadrifoglio, Maserati GranTurismo, Maserati Ghibli, and Maserati Quattroporte. 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
305/30R21: This size is designed for 21-inch wheels and is a practical choice for sports car and staggered performance fitments that need strong dry grip, wet braking, and fast steering response.
104Y 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.
MW marking: This SKU includes a Maserati marking, useful when matching a factory-style fitment or replacing tires on a vehicle originally equipped with the same designation.
| SECTION WIDTH Measures the width of the tire from sidewall to sidewall, which is mounted on a wheel and inflated. | 305 |
| ASPECT RATIO Determines the sidewall height of the tire, based on the width. | 30 |
| 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. | 28.2" |
| RIM WIDTH RANGE The approved range of rim widths this tire can be safely mounted on. | 10.5" - 11.5" |
| WEIGHT The weight of the tire measured in pounds (weight of tire only). | 27.18 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. | 104 |
| 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 | 85426 |
| GTIN Global Trade Item Number | 086699854261 |
Customer Reviews
Highly recommend Michelin tires..
Great tire. The rest of my family has also purchased these tires.
Absolutely first rate tire. Tire life from last set was almost 30,000 miles. Noise low and performance first rate. Great on my M2 Competition.