Arroyo Tamarock AT LT275/70R18

Looking for a 275/70R18 all terrain tire? The Arroyo Tamarock AT is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.

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.

The service description on this tire decodes to a load index of 125 — a maximum load of 3,638 lbs per tire. The speed symbol S corresponds to a maximum sustained speed of 112 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

What kind of tire is the Arroyo Tamarock AT?

The Arroyo Tamarock AT in 275/70R18 is a all terrain tire.

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 does 125S mean on the Arroyo Tamarock AT?

125S breaks down as load index 125 — rated for 3,638 lbs per tire — with an S speed rating, good for a maximum sustained 112 mph.

Keep shopping

Shop all 275/70R18 tires, see every Arroyo Tamarock AT size, explore all terrain tires, or view all tires at ThreePiece.us.