Nitto NIT Ridge Grappler LT325/65R18/10

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What 325/65R18 means

In the size 325/65R18, 325 is the section width in millimeters (12.80 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 211.2 mm (8.32 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 34.63 inches, turning roughly 582 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 127 — a maximum load of 3,858 lbs per tire, or 124 (3,527 lbs) per tire when mounted as duals. The speed symbol Q corresponds to a maximum sustained speed of 99 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

Will 325/65R18 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 325/65R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.

What does 127/124Q mean on the Nitto Ridge Grappler?

127/124Q breaks down as load index 127 — rated for 3,858 lbs per tire (124, or 3,527 lbs, in dual fitment) — with a Q speed rating, good for a maximum sustained 99 mph.

What kind of tire is the Nitto Ridge Grappler?

The Nitto Ridge Grappler in 325/65R18 is a all season tire.

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