Pirelli PZero 255/40R19XL 100Y - 3786500

Looking for a 255/40R19 summer tire? The Pirelli PZero is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.

What 255/40R19 means

In the size 255/40R19, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 19 is the wheel diameter in inches. That works out to an overall diameter of about 27.03 inches, turning roughly 746 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 27.68 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 100 — a maximum load of 1,764 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

What kind of tire is the Pirelli PZero?

The Pirelli PZero in 255/40R19 is a summer tire.

Will 255/40R19 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 255/40R19, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/40R19 tire in stock to compare options.

What does 100Y mean on the Pirelli PZero?

100Y breaks down as load index 100 — rated for 1,764 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.

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