Firestone Duraforce UT 340/80R18 - 004502

Looking for a 340/80R18 tire? The Firestone Duraforce UT is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.

What 340/80R18 means

In the size 340/80R18, 340 is the section width in millimeters (13.39 in), 80 is the aspect ratio — the sidewall stands 80% as tall as the tire is wide, or 272.0 mm (10.71 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 39.42 inches, turning roughly 512 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.

Specifications

Frequently asked questions

How fast does this tire ship?

Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.

Will 340/80R18 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 340/80R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

Keep shopping

Browse Firestone tires, see every Firestone Duraforce UT size, or view all tires at ThreePiece.us.