9.50: This number represents the tire's aspect ratio, which is the ratio of the tire's height to its width. In this case, the tire's aspect ratio is 9.50, meaning that the tire's height is 9.50 inches for every 30 inches of width.
R: This letter indicates that the tire is a radial tire. Radial tires are the most common type of tire on modern vehicles, and they offer a number of advantages over bias-ply tires, including improved fuel economy, handling, and ride quality.
15: This number represents the tire's rim diameter in inches. In this case, the tire has a rim diameter of 15 inches.
LT: This designation indicates that the tire is a light truck tire. Light truck tires are designed for use on vehicles such as pickup trucks, vans, and SUVs. They are typically made with thicker sidewalls and tread than passenger car tires, which makes them more resistant to punctures and damage.
