Asian Tire Safety
Every tire sold for use on public highways in the US are required to be certified by the manufacturer to be capable of meeting the quality and safety requirements as published by the National Highway Traffic Safety Administration which is a part of the US Department of Transportation. These requirements are very detailed and cover many test and conditions all tires must meet at a minimum. The penalty for selling a tire that does not meet these requirements is very significant.
The speed rating tells you the speed the tire can safely maintain over time. A higher speed rating usually means you will have better control and handling at higher speeds — and that the tire can take the extra heat. Generally, tires with higher speed ratings also handle better at slower speeds..
Spare Tire Life & Safety
When you have to use your spare, it’s urgent to know the limits of you’re a spare tire. Spares are not designed to drive at the same speed as regular tires; never let your speed exceed 50 miles an hour when you’ve got a spare on your car. Most spare tire mileage is around 50 miles.