The alphanumeric designation ST225/75R15 defines a specific type of tire commonly used on recreational vehicles. The ‘ST’ prefix indicates “Special Trailer,” denoting the tire is designed for trailer applications, not passenger vehicles. The ‘225’ specifies the tire’s section width in millimeters, while ’75’ represents the aspect ratio, the percentage of the section width that equals the sidewall height. The ‘R’ signifies radial construction, and ’15’ indicates the wheel diameter in inches. This complete code identifies a tire optimized for the load and performance demands of towed trailers.
Selecting the appropriately sized and rated tire is crucial for safe and efficient towing. These tires are engineered to withstand the higher loads and unique stresses associated with trailer use, preventing premature wear, handling issues, and potential tire failure. Utilizing tires built for these conditions contributes to improved fuel economy, enhanced stability, and overall safety during transit. The engineering incorporated into these tires is based on years of experience and refined material science.
