Pirelli Scorpion Zero All Season 285/40R20XL 108Y - 3793500

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What 285/40R20 means

In the size 285/40R20, 285 is the section width in millimeters (11.22 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 114.0 mm (4.49 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.98 inches, turning roughly 696 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 28.03 inches — when clearance is tight, go by the published figure rather than the nominal size math.

The service description on this tire decodes to a load index of 108 — a maximum load of 2,205 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

Will 285/40R20 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 285/40R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

What does 108Y mean on the Pirelli Scorpion Zero All Season?

108Y breaks down as load index 108 — rated for 2,205 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.

What kind of tire is the Pirelli Scorpion Zero All Season?

The Pirelli Scorpion Zero All Season in 285/40R20 is a all season tire.

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