What do tire ratings mean?
A tire’s speed rating indicates the optimal speed that the tire can safely maintain over time. The speed rating system was developed to help control the safe performance of tires at standardized speeds. A tire’s certified speed rating is given a letter from A to Z, ranging from 5km/h (3mph) to above 300 km/h (186…
A tire’s speed rating indicates the optimal speed that the tire can safely maintain over time. The speed rating system was developed to help control the safe performance of tires at standardized speeds. A tire’s certified speed rating is given a letter from A to Z, ranging from 5km/h (3mph) to above 300 km/h (186 mph).Click to see full answer. Similarly, you may ask, what does the T or H mean on tires?All these ratings cover speeds well above legal limits. The most popular, S, T, and H, are rated for 112, 118, and 130 mph, respectively. Traditionally, most family cars have used S- and T-rated tires, while tires rated H and higher have mostly been available only in sports cars or upscale sports sedans.Subsequently, question is, does tire speed rating matter? Tire Speed Rating and Why It Matters. Each letter in the speed rating represents a maximum speed based on a standard chart. The main things to know: Generally, the higher in the alphabet a tire is rated, the better it will manage heat and faster speeds. Thereof, what do tire codes mean? The two-digit number that usually follows the tire’s section width tells us the aspect ratio, or tire profile measurement. In this example, the 45 indicates that the sidewall distance, from the wheel rim to the outside of the tread, is 45% of the section width.How do you read a tire rating? Tire Size Markings P = Passenger Car Tire. The first letter on a tire indicates the tire’s class. 245 = Section Width. Tread (mm) 45 = Aspect Ratio. (Ratio of Sidewall height to width) Z = Speed Rating. S = 112mph. R = Radial. Construction. 19 = Wheel. Diameter. 98 = Load. Index. W = Speed. Rating.
