Michelin Pilot Sport 4 S 255/40ZR21XL (102Y) Ultra High-Performance Tire
Michelin Pilot Sport 4 S 255/40ZR21XL (102Y) is a benchmark Max Performance Summer Tire engineered for the world’s most demanding sports cars, luxury sedans, and performance SUVs. Born from Michelin’s legendary racing heritage, it features Bi-Compound Technology for ultimate dry grip and Dynamic Response Technology for razor-sharp steering precision. While it excels in both wet and dry conditions, its specialized rubber compound is optimized for warm-weather performance, providing shorter braking distances and exceptional lateral stability. Backed by a 30,000-mile limited warranty, it is the top choice for enthusiasts who prioritize maximum traction and high-speed control.
Technical Specifications
| Specification | Detail |
|---|---|
| Tire Size | 255/40ZR21XL |
| Tire Width | 255 mm |
| Aspect Ratio | 40 |
| Wheel Diameter | 21 in |
| Load Index | 102 |
| Speed Rating | (Y) |
| Construction | Radial |
| Ply Rating | XL |
| Load Range | Extra Load |
| Sidewall | Black Wall |
| Max Load (Single) | 1,874 lbs @ 50 PSI |
| Overall Diameter | 29.0 in |
| Minimum Rim Width | 8.5 in |
| Revolutions Per Mile | 717 |
| Tread Depth | 9/32 in |
| UTQG Rating | 300 |
| Mileage Warranty | 30,000 Miles |
| Studdable | No |
| Extended Mobility | No |
| Ship Weight | 28.66 lbs |
| Vehicle Type | Performance Car / SUV |
Key Features & Benefits
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Elite Cornering Precision: The ultra-reactive tread pattern adapts continuously to the road surface, maximizing the contact patch for exceptional lateral grip and stability.
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Superior Wet Braking: Advanced silica-based compounds allow the tire to maintain flexibility on slick surfaces, resulting in shorter stopping distances in heavy rain.
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Refined Performance Ride: Built with Comfort Control Technology™, using computer-optimized design and precision manufacturing to reduce road vibrations and cabin noise.
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Instant Feedback: The aramid and nylon reinforcement helps the tire resist centrifugal distortion at high speeds, ensuring consistent steering response and predictable handling.
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Track-Inspired Durability: Engineered to withstand occasional track use while remaining refined enough for everyday spirited driving.
Item Specifics
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Brand: Michelin
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Model: Pilot Sport 4 S
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MPN / Part Number: 06699
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Tire Width: 255 mm
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Aspect Ratio: 40
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Wheel Diameter: 21 in
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Load Index: 102
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Speed Rating: (Y)
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Season: All-Season
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Construction: Radial
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Ply Rating: XL
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Load Range: Extra Load
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Sidewall: Black Wall
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Max Load (Single): 1,874 lbs @ 50 PSI
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Overall Diameter: 29.0 in
-
Rim Width (Min): 8.5 in
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RPM: 717
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Tread Depth: 9/32 in
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UTQG: 300
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Mileage Warranty: 30,000 Miles
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Studdable: No
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Extended Mobility: No
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Vehicle Type: Performance Vehicle
Why Buy from AlloyExpressWheel.com
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Authentic & High-Quality Inventory
At AlloyExpressWheel.com, you’ll find genuine Michelin Tires — no fake or low-grade copies, just trusted, top-quality gear. -
Expert Advice for Fitment
We know Michelin Tires. Our team helps make sure you pick the right Tires for your vehicle. -
Competitive Pricing
We source Michelin Tires at highly competitive rates — you’re paying for the product, not inflated margins. -
Secure Packaging & Reliable Shipping
Michelin Tires are heavy and delicate. We ship with protective packaging and partner with reliable shippers so your Tires arrive in perfect condition. -
Excellent Customer Service
From pre-sale support to after-sales help, we’re committed to your satisfaction. Need help with mounting, fitment, or returns? We’ve got your back. -
Warranty & Return Support
We sell quality Tires from brands like Michelin that are backed by manufacturer warranties. And if there’s a problem, we’re here to assist.



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