Arroyo Eco Pro HT 275/70R18

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What 275/70R18 means

In the size 275/70R18, 275 is the section width in millimeters (10.83 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 192.5 mm (7.58 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 33.16 inches, turning roughly 608 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 18 inches — when clearance is tight, go by the published figure rather than the nominal size math.

Specifications

Frequently asked questions

Will 275/70R18 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 275/70R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 275/70R18 tire in stock to compare options.

What kind of tire is the Arroyo Eco Pro HT?

The Arroyo Eco Pro HT in 275/70R18 is a light truck tire.

What are the treadwear and warranty ratings on the Arroyo Eco Pro HT?

This tire carries a treadwear grade of 600, traction grade A, temperature grade B under UTQG.

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