Pirelli PZero System Asimmetrico 245/40ZR17 91(Y) - 2541400

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What 245/40R17 means

In the size 245/40R17, 245 is the section width in millimeters (9.65 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 98.0 mm (3.86 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 24.72 inches, turning roughly 816 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 91 — a maximum load of 1,356 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Pirelli PZero System Asimmetrico?

This tire carries a treadwear grade of 140, traction grade A, temperature grade A under UTQG.

What does 91Y mean on the Pirelli PZero System Asimmetrico?

91Y breaks down as load index 91 — rated for 1,356 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.

What kind of tire is the Pirelli PZero System Asimmetrico?

The Pirelli PZero System Asimmetrico in 245/40R17 is a summer tire.

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