Michelin Pilot Sport Cup 2 315/30ZR21XL (105Y) Performance Tire
Michelin Pilot Sport Cup 2 315/30ZR21XL (105Y) is a street-legal, track-focused ultra-high-performance tire engineered for drivers who demand the ultimate in dry-weather grip and precision. As the Original Equipment (N0) choice for elite Porsche models, it features Michelin’s Bi-Compound 2.0 Technology, utilizing a high-molecular-chain elastomer on the outer shoulder for massive cornering adherence and a rigid elastomer on the inner tread for surgical steering control. Built with Track Longevity Technology 2.0, this tire delivers up to 40% more track endurance than leading competitors, allowing you to achieve faster, more consistent lap times without sacrificing the ability to drive home from the circuit.
Technical Specifications
| Specification | Detail |
|---|---|
| Tire Size | 315/30ZR21XL |
| Tire Width | 315 mm |
| Aspect Ratio | 30 |
| Wheel Diameter | 21 in |
| Load Index | 105 |
| Speed Rating | (Y) |
| Construction | Radial |
| Ply Rating | XL |
| Load Range | Extra Load |
| Sidewall | Black Wall |
| Max Load (Single) | 2,039 lbs @ 50 PSI |
| Overall Diameter | 28.5 in |
| Section Width | 315 mm |
| Minimum Rim Width | 10.5 in |
| Revolutions Per Mile | 731 |
| Tread Depth | 7.2/32 in |
| UTQG Rating | 180 |
| Extended Mobility | No |
| Studdable | No |
| OE Marking | N0 |
| Ship Weight | 31.57 lbs |
Key Features & Benefits
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Dominant Dry Track Grip: Engineered to shave seconds off your lap times, providing nearly 2 seconds of improvement over previous generations on a standard circuit.
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Surgical Steering Accuracy: The rigid inner tread elastomer ensures that every driver input is met with an immediate and predictable response, even under extreme G-loads.
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Elite High-Speed Stability: Reinforced with twin steel belts and Twaron® cord, this tire maintains its shape and performance at the highest speeds your supercar can reach.
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Street Legal Performance: Unlike dedicated slicks, the Cup 2 meets all DOT requirements, allowing you to drive to the track, dominate the session, and drive home on the same set.
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Optimized for Porsche Dynamics: The N0 marking guarantees that this tire is optimized for the specific weight distribution and suspension geometry of Porsche’s 21-inch wheel applications.
Item Specifics
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Brand: Michelin
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Model: Pilot Sport Cup 2
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MPN / Part Number: 15531
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Tire Width: 315 mm
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Aspect Ratio: 30
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Wheel Diameter: 21 in
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Load Index: 105
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Speed Rating: (Y)
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Season: Summer / Performance
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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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Extended Mobility: No
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OE Marking: N0
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Max Load (Single): 2,039 lbs @ 50 PSI
-
Overall Diameter: 28.5 in
-
Rim Width (Min): 10.5 in
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RPM: 731
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Tread Depth: 7.2/32 in
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UTQG: 180
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Studdable: No
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Vehicle Type: Ultra-High-Performance Sports Car
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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