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Michelin Pilot Sport All Season 4, 255 /40 R21 102Y XL BSW
Outfit your performance vehicle with the Michelin Pilot Sport All Season 4 255/40R21 102Y XL BSW, an ultra-high-performance all-season tire built for drivers who want sharp steering, strong wet and dry grip, winter confidence, and daily usability from one performance tire. This 255/40R21 Pilot Sport All Season 4 is a popular responsive fitment for select Polestar 2, BMW i4, Ford Mustang Mach-E, Kia EV6 GT, Tesla Model 3 Performance, Tesla Model S models, plus similar performance vehicles using 21-inch wheels.
Why choose the Michelin Pilot Sport All Season 4 in 255/40R21?
Built for performance SUVs, EV crossovers, and luxury sport utility vehicles: The 102Y XL rating adds extra load capacity for heavier trims, performance packages, EVs, cargo, passengers, and staggered setups.
Ultra-high-performance all-season grip: The Pilot Sport All Season 4 is designed for confident performance on wet, dry, and snowy roads without moving to a dedicated summer tire.
Dynamic Response Technology: Michelin engineers the tire to distribute forces and temperatures evenly, supporting responsive handling and longer wear life.
Asymmetric performance tread: A performance-focused tread pattern with strong outer-shoulder support helps deliver lateral grip, steering precision, and planted cornering.
All-season traction details: Full-depth and interlocking sipes, biting edges, and Michelin tread-compound technology help maintain grip in rain, cold conditions, and light snow.
Popular vehicle fitments for 255/40R21 Michelin Pilot Sport All Season 4
This tire size is commonly used on select trims or staggered fitments of the Polestar 2, BMW i4, Ford Mustang Mach-E, Kia EV6 GT, Tesla Model 3 Performance, and Tesla Model S. It is also a strong option for similar sports cars, performance sedans, EVs, premium crossovers, and SUVs that use the same tire size, load rating, speed rating, and wheel diameter.
Size and rating details
255/40R21: This size is designed for 21-inch wheels and helps shoppers match an original equipment, replacement, or staggered performance fitment.
102Y XL: The service description and load range identify the tire's load capacity and speed rating for compatible performance vehicles.
BSW: This version uses black sidewall styling for the finished look on the vehicle.
Frequently asked questions
Is the Michelin Pilot Sport All Season 4 255/40R21 good for daily driving?
Yes. It is built for drivers who want performance handling, wet-road grip, and light-snow capability while still using one tire for everyday commuting and weekend driving.
What vehicles use the Michelin Pilot Sport All Season 4 255/40R21?
Popular applications include select Polestar 2, BMW i4, Ford Mustang Mach-E, and Kia EV6 GT models, along with comparable vehicles using the same size, load range, and speed rating.
Does the Michelin Pilot Sport All Season 4 have a mileage warranty?
Yes. Michelin lists mileage warranty coverage up to 45,000 miles for many V-, W-, and Y-speed-rated replacement sizes.
UNIFORM TIRE QUALITY GRADE (UTQG)Uniform Tire Quality Grade
| SECTION WIDTH Measures the width of the tire from sidewall to sidewall, which is mounted on a wheel and inflated. | 255 / 265 |
| ASPECT RATIO Determines the sidewall height of the tire, based on the width. | 40 / 35 |
| RIM DIAMETER Measures the rim size from top to bottom (in inches). | 21" / 21" |
| OVERALL DIAMETER Measures the tire height from top to bottom when mounted on a wheel and inflated. | 29" / 28.3" |
| RIM WIDTH RANGE The approved range of rim widths this tire can be safely mounted on. | 8.5" - 10.0" / 9.0" - 10.5" |
| WEIGHT The weight of the tire measured in pounds (weight of tire only). | 32.25 LBS / 26.32 LBS |
| TREAD DEPTH Measured in /32 of an inch to determine the height of the tread block from top to bottom. | 10/32" / 10/32" |
| LOAD INDEX Determines the weight a tire can carry at maximum air pressure. See load Index chart. | 102 / 101 |
| LOAD RANGE Determines the ply rating of the tire. Should be replaced with the same or higher rating. | XL / 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 / 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 / Up to 186 mph |
| SIDEWALL DESC. The sidewall designation to describe the lettering on the sidewall. | Black Side Wall / Black Side Wall |
| WARRANTY Estimates the life expectancy of the tire, set by the tire manufacturer. | 45000 / 45000 |
| VPN Vendor Product Number | 25642 / 72103 |
| GTIN Global Trade Item Number | 086699256423 / 086699721037 |
Pilot Sport All Season 4 Customer Reviews
Very committed team
Looking for a replacement tire for your CT5 w 20" wheels I highly recommend this tire instead of the run flats.
This is a great tire, please font change it!