Continental Cross Contact RX 255/40R21XL 102W - 03594300000

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What 255/40R21 means

In the size 255/40R21, 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 21 is the wheel diameter in inches. That works out to an overall diameter of about 29.03 inches, turning roughly 695 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 102 — a maximum load of 1,874 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Continental Cross Contact RX?

This tire carries a treadwear grade of 480, traction grade A, temperature grade A under UTQG.

What does 102W mean on the Continental Cross Contact RX?

102W breaks down as load index 102 — rated for 1,874 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.

What kind of tire is the Continental Cross Contact RX?

The Continental Cross Contact RX in 255/40R21 is a all season tire.

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