AMP Terrain Pro A/T Tire - LT265/70R17 121/118S

That 121/118 is a dual load index, and it exists only on LT-metric tires. The higher figure, 121, is worth 3,197 lb and applies when the tire runs singly — a front axle, or the rear of a single-rear-wheel truck. The lower figure, 118, is worth 2,910 lb and applies in a dual-rear-wheel position, where paired tires trap heat between them and share load imperfectly.

LT construction also means no P-metric derating: the casing is built for higher inflation pressures and rates its capacity directly, which is the whole point on a working half-ton or three-quarter-ton truck.

The S speed symbol covers 112 mph. AMP Terrain Pro A/T is a light-truck all-terrain, and this LT265/70R17 fitment is available to order at Rev Auto Club.