Cooper Discoverer STT Pro 38x13.50R20 Tires

Cooper Discoverer STT Pro 38x13.50R20 D 123Q is a mud-terrain tire priced from $562.99.

Cooper Discoverer STT Pro 38x13.50R20 D 123Q Tire Specs

38x13.50R20 is a Flotation tire.

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

38 is the overall diameter of a tire, or tire height, when it is fully inflated and not under load. For 38x13.50R20, tire diameter is 38 inches.

13.50 indicates the 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 38x13.50R20 tire is 13.50 inches.

R denotes that 38x13.50R20 tire has radial construction.

20 represents the wheel diameter in inches that the tire is designed to fit. 38x13.50R20 can be mounted on rims with 20 inches in diameter.

D denotes the load range of a tire. Load Range D is equivalent to an 8-ply rating in the old system, but the actual number of plies in the tire may be different. These tires are generally rated for a maximum inflation pressure of 65 psi, and are commonly found on light trucks, SUVs, and trailers, where higher load carrying capacity is needed. They are particularly important for vehicles that are used for towing or carrying heavy loads.

123 indicates the load index. A tire with a load index of 123 can support a maximum load of 3417 pounds or 1550 kilograms per tire.

Q indicates the speed rating. A tire with a speed rating of Q is approved for speeds up to 99 miles per hour or 159 kilometers per hour under optimal conditions.

Maximum inflation for Cooper Discoverer STT Pro 38x13.50R20 tire is 50 psi.

Tire manufacturer part number (MPN) is 170143006.