What does St mean on tire?
Special Trailer tire
Tires beginning with a ST (for example ST175/80R13) indicate a Special Trailer tire and should only be used on car, boat or utility trailers.
What does ST and LT mean on tires?
LT tires generally have about 30% more rubber by weight. ST tires normally have a speed rating of 65 mph. LT tires do not have a rating this low. LT tires have a lower weight rating than ST tires because the rating system is more lenient for ST tires because they are not used to haul human passengers.
What is the difference between ST and P tires?
A “P” tire is for passenger car use where as an “ST” (specialty trailer) tire is designed for use on trailers. An “LT” reference on a tire means Light Truck.
What is an ST radial tire?
Special trailer (ST) tires are bigger, heavier and increasingly available in all-steel radial construction to meet the towing demands of more powerful vehicles and larger campers.
How long do ST tires last?
But the experts agree you can count on STs last anywhere from 5,000 to 12,000 miles; with proper care, they can last past 12,000 miles as well. The side of the spectrum your tires end up is all about the other factors mentioned in this section: the age of the tire and type of mileage.
How fast can ST tires go?
The Tire and Rim Association load formula used by the industry for ST-type tires is based on a 65 mph max operating speed. They even identified inflation increase and load capability reductions necessary to operate up to 75 mph.
Can you use ST tires on a truck?
Yes, both special trailer (ST) and light truck (LT) tires can be used on a 5th wheel trailer. They are actually the only two types of tires rated for this use. The reason for this is that tires on a trailer will be subjected to much harsher conditions that require a stiffer sidewall.
What are LT tires good for?
LT-metric tires are used for rougher driving conditions. You’ll find these tires on SUVs, pickups, and vans that tend to haul a heavier load and travel in more off-road conditions. P-metric tires offer a quieter, smoother, and more comfortable ride.
Why do trailer tires wear out so fast?
That said, rapid or significantly uneven trailer tire wear can be caused by: Riding with the wrong tire pressure. Exceeding your tires’ load capacity. Trailer misalignment or bent wheels from hitting curbs, potholes or debris.
How many miles do RV tires last?
Typically, a good-quality RV tire can last for at least 8,000 miles and possibly up to 12,000 through a 3-4-year period. That would be a fair amount of usage for an RV with a considerable weight compared to a regular automobile.
How fast can I drive with my trailer tires?
Unless otherwise noted trailer tires are rated as 65 miles per hour as their max speed. Exceeding the speed rating will cause the tire to heat up and fail easier.
What load range is a 12 ply tire?
F
Light Truck Tires
| LT-Metric, LT-Flotation and LT-Numeric Light Truck Tires | ||
|---|---|---|
| Load Range | Ply Rating | Maximum Load Pressure ≤ 295mm / 11.5″ wide |
| D | 8 | 65 psi (450 kPa)*** |
| E | 10 | 80 psi (550 kPa)*** |
| F | 12 | 95 psi (650 kPa)*** |
What is the best tire speed rating?
500 – The durability rating of a tire,compared to a control tire with a treadlife of 100.
How to read tire ratings?
– The index is not a hard number; it’s just a symbol of sorts. – To find out how much your entire car can carry without putting undue strain on your tires, multiply the number you found in the Load-Carrying Capacity Per Tire chart by – Never replace your tires with ones that have a lower load index than the original tires.
How to read tire speed rating and load index?
L
What are St tires?
With that said the designation ST stands for “Special Trailer” tire. ST tires are designed specifically for use on trailer axle positions only. They are not designed for steering axle positions or the traction requirements of a drive axle.