Lt Tire Meaning. Including but not limited to boat trailers utility trailers and 5th wheels. Lt if a tire size begins with lt it signifies the tire is a light truck metric size that was designed to be used on vehicles that are capable of carrying heavy cargo or towing large trailers.
Tires labeled st or special trailer are meant for trailers. The first number indicates load carrying capacity if the tire is installed on a truck with a single wheel rear axle and the second number applies when the tire is used in a dual rear application. A tire labeled t or temporary spare is meant to be used in the event of a flat tire.
P metric method of tire sizing.
Most passenger tires today have metric or p metric sizes. Lt stands for light truck st is for special trailer and t stands for temporary which is primarily used for small spare tires. Lt tires are commonly used on trucks with dual rear wheels and are branded with two load indexes. These are the sizes most of you are probably familiar with such as 205 55r16.
