Pirelli PIR Winter SottoZero Series 3 245/35R21XL

The Pirelli Winter SottoZero Series 3 in 245/35R21 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 245/35R21 means

In the size 245/35R21, 245 is the section width in millimeters (9.65 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 85.8 mm (3.38 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 27.75 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 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 96 — a maximum load of 1,565 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.

Specifications

Frequently asked questions

What does 96W mean on the Pirelli Winter SottoZero Series 3?

96W breaks down as load index 96 — rated for 1,565 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.

What kind of tire is the Pirelli Winter SottoZero Series 3?

The Pirelli Winter SottoZero Series 3 in 245/35R21 is a high performance tire.

Will 245/35R21 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 245/35R21, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/35R21 tire in stock to compare options.

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Shop all 245/35R21 tires, see every Pirelli Winter SottoZero Series 3 size, or view all tires at ThreePiece.us.