Pirelli PIR P-Zero (PZ4) 265/40R21

The Pirelli P-Zero (PZ4) in 265/40R21 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 265/40R21 means

In the size 265/40R21, 265 is the section width in millimeters (10.43 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 106.0 mm (4.17 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 29.35 inches, turning roughly 687 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 21 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 105 — a maximum load of 2,039 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.

Specifications

Frequently asked questions

What does 105H mean on the Pirelli P-Zero (PZ4)?

105H breaks down as load index 105 — rated for 2,039 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.

What kind of tire is the Pirelli P-Zero (PZ4)?

The Pirelli P-Zero (PZ4) in 265/40R21 is a high-performance tire.

What are the treadwear and warranty ratings on the Pirelli P-Zero (PZ4)?

This tire carries a treadwear grade of 280, traction grade AA, temperature grade A under UTQG.

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