Cooper Discoverer AT3 XLT LT275/55R20 Tires

Cooper Discoverer AT3 XLT LT275/55R20 E 120/117S is an all-terrain tire.

Cooper Discoverer AT3 XLT LT275/55R20 E 120/117S Tire Specs

LT275/55R20 is a LT-Metric tire. It also comes in a Metric (275/55R20) and a P-Metric (P275/55R20) variant

Let us decode each aspect of the tire size code to have a full understanding what this tire size means.

LT indicates that LT275/55R20 is a light truck tire.

275 is a section width of the tire from one sidewall to the other. Tire tread width is typically a bit narrower than the section width. Section width of LT275/55R20 tire is 275 millimeters.

55 represents the aspect ratio of a tire, which is a ratio of the tire's sidewall height to its width. For LT275/55R20 tire, the sidewall height is 55% of its tread width.

R denotes that LT275/55R20 tire has radial construction.

20 represents the wheel diameter in inches that the tire is designed to fit. LT275/55R20 can be mounted on rims with 20 inches in diameter.

E denotes the load range of a tire. Load Range E is equivalent to a 10-ply rating, but this doesn't mean the tire actually has 10 physical plies. These tires are generally rated for a maximum inflation pressure of 80 psi, and are commonly used on vehicles that carry heavy cargo or tow trailers, such as full-size vans, pickup trucks, and larger SUVs. They are also found on commercial trucks and RVs.

120/117 indicates a dual load index, meaning a tire can be used in a single or a dual application. For a single application, load index of 120 can support a maximum load of 3086 pounds or 1400 kilograms per tire. For a dual application, load index of 117 can support a maximum load of 2833 pounds or 1285 kilograms per tire.

S indicates the speed rating. A tire with a speed rating of S is approved for speeds up to 112 miles per hour or 180 kilometers per hour under optimal conditions.

Uniform Tire Quality Grading System (UTQG) rating for Cooper Discoverer AT3 XLT LT275/55R20 tire is 320 A A.

Tire manufacturer part number (MPN) is 90000032855.