Ironman I-181 255/70R22.5/16 140/137M - 86211

The Ironman I-181 in 255/70R22.5 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 255/70R22.5 means

In the size 255/70R22.5, 255 is the section width in millimeters (10.04 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 178.5 mm (7.03 in) — R denotes radial construction, and 22.5 is the wheel diameter in inches. That works out to an overall diameter of about 36.56 inches, turning roughly 552 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 140 — a maximum load of 5,512 lbs per tire, or 137 (5,071 lbs) per tire when mounted as duals. The speed symbol M corresponds to a maximum sustained speed of 81 mph.

Load Range H corresponds to a 16-ply rating.

Specifications

Frequently asked questions

What does 140/137M mean on the Ironman I-181?

140/137M breaks down as load index 140 — rated for 5,512 lbs per tire (137, or 5,071 lbs, in dual fitment) — with an M speed rating, good for a maximum sustained 81 mph.

Will 255/70R22.5 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 255/70R22.5, 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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