Ironman Iron RB 12 NWS 215/75R15

The Ironman RB 12 NWS in 215/75R15 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 215/75R15 means

In the size 215/75R15, 215 is the section width in millimeters (8.46 in), 75 is the aspect ratio — the sidewall stands 75% as tall as the tire is wide, or 161.2 mm (6.35 in) — R denotes radial construction, and 15 is the wheel diameter in inches. That works out to an overall diameter of about 27.70 inches, turning roughly 728 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 100 — a maximum load of 1,764 lbs per tire. The speed symbol S corresponds to a maximum sustained speed of 112 mph.

Specifications

Frequently asked questions

What does 100S mean on the Ironman RB 12 NWS?

100S breaks down as load index 100 — rated for 1,764 lbs per tire — with an S speed rating, good for a maximum sustained 112 mph.

What kind of tire is the Ironman RB 12 NWS?

The Ironman RB 12 NWS in 215/75R15 is a touring tire.

Will 215/75R15 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 215/75R15, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

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