Yokohama YOK Avid GT S35 225/40R18

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What 225/40R18 means

In the size 225/40R18, 225 is the section width in millimeters (8.86 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 90.0 mm (3.54 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.09 inches, turning roughly 804 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 88 — a maximum load of 1,235 lbs per tire. The speed symbol V corresponds to a maximum sustained speed of 149 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Yokohama Avid GT S35?

This tire carries a treadwear grade of 280, traction grade B, temperature grade A under UTQG.

What does 88V mean on the Yokohama Avid GT S35?

88V breaks down as load index 88 — rated for 1,235 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.

What kind of tire is the Yokohama Avid GT S35?

The Yokohama Avid GT S35 in 225/40R18 is a touring tire.

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