Pirelli PZERO NERO M+S 285/25R20

Looking for a 285/25R20 tire? The Pirelli PZERO NERO M+S is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.

What 285/25R20 means

In the size 285/25R20, 285 is the section width in millimeters (11.22 in), 25 is the aspect ratio — the sidewall stands 25% as tall as the tire is wide, or 71.2 mm (2.81 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 25.61 inches, turning roughly 788 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.

The manufacturer lists the overall diameter of this specific tire as 20 inches — when clearance is tight, go by the published figure rather than the nominal size math.

Specifications

Frequently asked questions

How fast does this tire ship?

Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.

Will 285/25R20 tires fit my vehicle?

Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 285/25R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

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