Mickey Thompson MIK Baja Boss A/T LT285/65R18

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What 285/65R18 means

In the size 285/65R18, 285 is the section width in millimeters (11.22 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 185.2 mm (7.29 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 32.59 inches, turning roughly 619 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 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 E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

What warranty does the Mickey Thompson Baja Boss A/T carry?

The manufacturer's warranty on this tire is 50K.

What does 125/122Q mean on the Mickey Thompson Baja Boss A/T?

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 Mickey Thompson Baja Boss A/T?

The Mickey Thompson Baja Boss A/T in 285/65R18 is a all terrain tire.

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