What Do the Letters on Tire Ratings Mean?
4 Answers
Tire rating letters indicate the speed rating of the tire, where each corresponding letter represents the speed grade of the tire. The speed grade denotes the maximum speed at which the tire can carry a specified load under defined conditions. Tires are rubber products mounted on metal rims that roll on the ground, installed on vehicles or machinery. The functions of tires include: 1. Supporting the vehicle's weight and bearing the load; 2. Transmitting traction and braking torque to ensure adhesion between the wheels and the road surface; 3. Reducing and absorbing vibrations and impact forces during driving, ensuring safety, handling stability, comfort, and fuel efficiency.
The tire speed rating letter, simply put, represents the maximum speed a tire can handle. For example, T stands for 190 km/h, H for 210 km/h, and V up to 240 km/h—the higher the letter, the faster the speed. I often drive for leisure trips, so choosing the right speed rating is crucial. If the rating is too low, prolonged high-speed driving can cause the tires to overheat and potentially burst, which is very dangerous. I remember a friend who opted for cheaper S-rated tires once had an accident when speeding up to 180 km/h. Additionally, these letters also relate to handling and wear resistance; H-rated tires are suitable for most family cars, while W-rated ones are better for sports cars. These letters, along with the load index (e.g., 91 indicating load capacity), are printed on the tire sidewall. During routine maintenance, it’s best to glance at these labels when checking tire pressure monthly to ensure they match your car model. Before buying new tires, always refer to your vehicle’s manual for recommendations—don’t just rely on sales pitches. Safety first: better safe than sorry.
The letter markings on tires indicate speed ratings, which are super practical! H stands for high speed at 210 km/h, while V can go up to 240—the higher the letter, the more powerful. My own car has H-rated tires, which are fine for city driving, but I have to be careful not to exceed the speed limit on long highway trips. If the letter rating is inappropriate, the tires will wear out faster, fuel consumption will increase, and there’s even a risk of losing control. When buying tires, I usually check the model online beforehand; for example, compact cars typically use T or H-rated tires, while sports cars should opt for V or higher. The load index is also important—91 means a single tire can bear 615 kg. This combination of numbers and letters is clearly labeled on the tire sidewall. Avoid choosing tires based solely on price; once, I went for a cheaper, lower-rated tire and got a scare when it slipped in the rain. After changing tires, I recommend getting a balance test to boost driving confidence.
The tire rating letters represent speed limit symbols. Common examples include T for 190 km/h, H for 210, and V for 240. Higher letters indicate stronger, more pressure-resistant materials. The load index number, such as 91, corresponds to weight-bearing capacity. These are based on international standards and are marked on the tire sidewall. When selecting tires, match the car's recommendations; different models have varying needs: SUVs may require H or higher, while compact cars may suffice with T. Mismatched tires pose risks, such as high-speed blowouts or reduced braking performance. It's advisable to check the labels during regular maintenance and use tire pressure monitoring. Simple yet practical, don't overlook it.
