Hankook iON evo IK01 245/45ZR20XL 103Y - 1033441

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What 245/45R20 means

In the size 245/45R20, 245 is the section width in millimeters (9.65 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 110.2 mm (4.34 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.68 inches, turning roughly 703 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 28.5 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Hankook iON evo IK01?

This tire carries a treadwear grade of 320, traction grade AA, temperature grade A under UTQG.

What does 103Y mean on the Hankook iON evo IK01?

103Y breaks down as load index 103 — rated for 1,929 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.

What kind of tire is the Hankook iON evo IK01?

The Hankook iON evo IK01 in 245/45R20 is a summer tire.

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