Nitto NIT Ridge Grappler LT305/65R18/12

Looking for a 305/65R18 all season tire? The Nitto Ridge Grappler is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.

What 305/65R18 means

In the size 305/65R18, 305 is the section width in millimeters (12.01 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 198.2 mm (7.81 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 33.61 inches, turning roughly 600 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 128 — a maximum load of 3,968 lbs per tire, or 125 (3,638 lbs) per tire when mounted as duals. The speed symbol Q corresponds to a maximum sustained speed of 99 mph.

Load Range F corresponds to a 12-ply rating.

Specifications

Frequently asked questions

What kind of tire is the Nitto Ridge Grappler?

The Nitto Ridge Grappler in 305/65R18 is a all season tire.

Will 305/65R18 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 305/65R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

What does 128/125Q mean on the Nitto Ridge Grappler?

128/125Q breaks down as load index 128 — rated for 3,968 lbs per tire (125, or 3,638 lbs, in dual fitment) — with a Q speed rating, good for a maximum sustained 99 mph.

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