The Pilot Sport 4S is Michelin's ultra-high-performance summer tire for sport and performance cars. Dynamic Response Technology sharpens steering and cornering, while a hybrid compound with functional elastomers and silica improves dry grip, wet grip and braking. A deep rim protector helps guard the wheel against light curb contact.
In the 255/40ZR18 size, this tire has a 99Y load and speed rating with extra load (XL) construction. Specs include 9.5/32-inch tread depth, a 50 psi maximum inflation pressure, a UTQG rating of 300AAA and an overall diameter of about 26 inches. A 30,000-mile treadwear warranty applies to this size.
| Tire size | 255/40ZR18/XL (99Y) |
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| Tire load index | 99 |
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| Tire speed rating | (Y) |
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| Tire load range | Extra Load |
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| Tire season | Summer |
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| Tire terrain | Highway Terrain |
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| Uniform tire quality grade (utqg) | 300 AA A |
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| Tire treadwear rating | 300 |
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| Tire sidewall style | Black Sidewall |
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| Tread depth | 9.5/32 |
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| Overall diameter | 26 in |
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| Manufacturer | Michelin |
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| Tire width | 255 Millimeters |
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| Vehicle fitment type | Specific |
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| Is run flat | N |
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| Vehicle type | Car |
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| Construction type | Radial |
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| Electric vehicle tire | N |
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| Automotive parts division | Performance |
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| Wheel diameter | 18 in |
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| Flotation tire | N |
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| Maximum vehicle rim width | 10 in |
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| Features | Wet or Dry |
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| Items included | Tire Only |
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| Minimum vehicle rim width | 8.5 in |
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| Total count | 1 |
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| Vehicle class designator | P |
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| Tire location | Front and Rear Tires |
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| Tire diameter | 18 in |
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| Tire type | Passenger Car Tires |
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| Model | 98512 |
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| Maximum inflation pressure | 50 psi |
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| Tire aspect ratio | 40 |
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Specifications are as published by the manufacturer. Please confirm the size against the placard on your vehicle before ordering.
