What does the "ST" in the tire size "ST205/75R14" indicate?

The designation "ST" in the tire size "ST205/75R14" specifically stands for "Special Trailer." This indicates that the tire is designed specifically for use on trailers, rather than on vehicles such as trucks or cars.

Tires marked with "ST" have unique characteristics suitable for trailer applications, including higher load ratings and construction features that can handle the demands of towing. They are typically built to provide stability and durability while carrying the additional weight of a trailer and its cargo. Therefore, it's essential to use the appropriate tire type for trailers to ensure safety and performance on the road.

In contrast, other designations like "P" for passenger cars or "LT" for light trucks signify different intended uses and performance characteristics, making it crucial to match the tire type with the vehicle's requirements.