Pirelli PZero 255/35R21 98Y - 3781300

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What 255/35R21 means

In the size 255/35R21, 255 is the section width in millimeters (10.04 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 89.2 mm (3.51 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 28.03 inches, turning roughly 720 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 service description on this tire decodes to a load index of 98 — a maximum load of 1,653 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.

Specifications

Frequently asked questions

Will 255/35R21 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 255/35R21, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/35R21 tire in stock to compare options.

What does 98Y mean on the Pirelli PZero?

98Y breaks down as load index 98 — rated for 1,653 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.

What kind of tire is the Pirelli PZero?

The Pirelli PZero in 255/35R21 is a summer tire.

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