Firestone Radial 4000 TL R1W 280/70R18 114B - 365027

The Firestone Radial 4000 TL R1W in 280/70R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 280/70R18 means

In the size 280/70R18, 280 is the section width in millimeters (11.02 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 196.0 mm (7.72 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 33.43 inches, turning roughly 603 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 33.7 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 114 — a maximum load of 2,601 lbs per tire.

Specifications

Frequently asked questions

What does 114B mean on the Firestone Radial 4000 TL R1W?

114B breaks down as load index 114 — rated for 2,601 lbs per tire.

Will 280/70R18 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 280/70R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

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.

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