American Roadstar Sport AS 225/55R19

The American Roadstar Sport AS in 225/55R19 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 225/55R19 means

In the size 225/55R19, 225 is the section width in millimeters (8.86 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 19 is the wheel diameter in inches. That works out to an overall diameter of about 28.74 inches, turning roughly 702 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 19 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.

Specifications

Frequently asked questions

What does 103V mean on the American Roadstar Sport AS?

103V breaks down as load index 103 — rated for 1,929 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.

What are the treadwear and warranty ratings on the American Roadstar Sport AS?

This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG.

Will 225/55R19 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 225/55R19, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 225/55R19 tire in stock to compare options.

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