Hercules TIS Offroad RT1 LT305/55R20/12 125/122Q - 98827

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What 305/55R20 means

In the size 305/55R20, 305 is the section width in millimeters (12.01 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 167.8 mm (6.60 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 33.21 inches, turning roughly 607 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 125 — a maximum load of 3,638 lbs per tire, or 122 (3,307 lbs) per tire when mounted as duals. The speed symbol Q corresponds to a maximum sustained speed of 99 mph.

Load Range F corresponds to a 12-ply rating.

Specifications

Frequently asked questions

What warranty does the Hercules TIS Offroad RT1 carry?

The manufacturer's warranty on this tire is 55K.

What does 125/122Q mean on the Hercules TIS Offroad RT1?

125/122Q breaks down as load index 125 — rated for 3,638 lbs per tire (122, or 3,307 lbs, in dual fitment) — with a Q speed rating, good for a maximum sustained 99 mph.

What kind of tire is the Hercules TIS Offroad RT1?

The Hercules TIS Offroad RT1 in 305/55R20 is a all season tire.

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