Pirelli PIR P-Zero (PZ4) 275/45R21 XL 110H

Shop the Pirelli P-Zero (PZ4) 275/45R21 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.

What 275/45R21 means

In the size 275/45R21, 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 21 is the wheel diameter in inches. That works out to an overall diameter of about 30.74 inches, turning roughly 656 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 110 — a maximum load of 2,337 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.

Specifications

Frequently asked questions

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

This tire carries a treadwear grade of 220, traction grade AA, temperature grade A under UTQG.

What does 110H mean on the Pirelli P-Zero (PZ4)?

110H breaks down as load index 110 — rated for 2,337 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 275/45R21 is a high-performance tire.

Keep shopping

Shop all 275/45R21 tires, see every Pirelli P-Zero (PZ4) size, or view all tires at ThreePiece.us.