What does st mean on tires?

The letter S or st designates speed rating. tires with a lower speed rating have less tread and will be less safe for use on high-speed vehicles. The maximum speed rating a tire can reach is set by the tire’s specific construction and the type of vehicle it will be used on. Tires should always be marked with the maximum speed rating they can handle, in miles per hour, for the vehicle.

What does ST mean on tires?

If you have ever gone to the tire store to buy new tires and noticed that the letter after the circumference is “st” instead of the more common “T”, you may be wondering what the “st” in tire size designations stands for. It is simply the French abbreviation for “standard” which is the original tire sizing system that was adopted by tire manufacturers in France in the early 1900s. The “T” system was developed

What does 5 mean on tires?

A tire that has been pressurized to five pounds per square inch (psi) or less is said to be at optimum pressure. This amount of pressure is considered to be optimum for both fuel efficiency and handling. While five pounds of pressure is the norm for conventional tires, so-called lightweight tires are often sold at lower pressures for better fuel efficiency.

What does the speed read on tread mean?

Tread wear refers to the amount of tread that is visible on the tire’s surface. Treadwear is typically expressed as a percentage, with the lower the number, the better. Treadwear is especially helpful when driving in the rain or on wet pavement. Tires that have worn tread will experience increased tire temperatures, sometimes to unsafe levels. A low-profile tire can help reduce the amount of tread visible on the tire, so you can buy a new tire when tread becomes an

What does of 5 mean on tires?

The “of 5” refers to the amount of tread that remains after a tire has run for 5,000 miles. Car tires and their tread are designed to run for a set amount of time before they need to be replaced. Tread is the portion of the tire that touches the road and keeps the tire in contact with the ground. Tread also helps a tire ride more smoothly. The more tread on a tire, the better it is at keeping you safe and your vehicle running.