Nokian Surpass AS01 255/50R20XL 109W - T433069

The Nokian Surpass AS01 in 255/50R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 255/50R20 means

In the size 255/50R20, 255 is the section width in millimeters (10.04 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 127.5 mm (5.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 30.04 inches, turning roughly 671 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 109 — a maximum load of 2,271 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

What does 109W mean on the Nokian Surpass AS01?

109W breaks down as load index 109 — rated for 2,271 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.

What kind of tire is the Nokian Surpass AS01?

The Nokian Surpass AS01 in 255/50R20 is a all season tire.

What warranty does the Nokian Surpass AS01 carry?

The manufacturer's warranty on this tire is 55K.

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