Yokohama YOK Parada Spec-X 255/40R20XL

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What 255/40R20 means

In the size 255/40R20, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.03 inches, turning roughly 719 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 20 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 101 — a maximum load of 1,819 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 Parada Spec-X?

This tire carries a treadwear grade of 420, traction grade A, temperature grade A under UTQG.

What does 101V mean on the Yokohama Parada Spec-X?

101V breaks down as load index 101 — rated for 1,819 lbs per tire — with a V speed rating, good for a maximum sustained 149 mph.

What kind of tire is the Yokohama Parada Spec-X?

The Yokohama Parada Spec-X in 255/40R20 is a performance tire.

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