Pirelli PIR Cinturato P7 275/45R18

The Pirelli Cinturato P7 in 275/45R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 275/45R18 means

In the size 275/45R18, 275 is the section width in millimeters (10.83 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.74 inches, turning roughly 727 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 18 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.

Specifications

Frequently asked questions

What does 103W mean on the Pirelli Cinturato P7?

103W breaks down as load index 103 — rated for 1,929 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.

What kind of tire is the Pirelli Cinturato P7?

The Pirelli Cinturato P7 in 275/45R18 is a high-performance tire.

What are the treadwear and warranty ratings on the Pirelli Cinturato P7?

This tire carries a treadwear grade of 260, traction grade AA, temperature grade A under UTQG.

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