What is the 3T Index for Tires?
3 Answers
3T indicators refer to Treadwear, Traction, and Temperature grades. The following is the detailed content of the 3T index table: 1. Overview: The 3T index grades indicate the level of wear resistance, traction, and high-temperature resistance. The Treadwear grade reflects the tire's wear resistance—the higher the number, the more wear-resistant the tire is, but the harder the rubber, leading to poorer comfort. Conversely, a lower number means less wear resistance, softer rubber, and better comfort. 2. Treadwear Grade: TREADWEAR 220 indicates a wear resistance index of 220. Generally, a Treadwear index between 280-320 is considered moderate—too high or too low may result in excessive wear resistance or poor comfort. 3. Traction Grade: TRACTION A indicates the traction grade, with A grade proving strong traction. Traction grades from highest to lowest are AA, A, B, and C, with C being the lowest. 4. Temperature Grade: TEMPERATURE A represents the tire's temperature grade, with A grade indicating high-temperature resistance. For passenger car tires, the temperature grades from highest to lowest are A, B, and C.
I just changed my tires a couple of days ago, and out of curiosity, I checked the 3T index chart. It actually refers to three numerical codes on the tire sidewall, representing key performance indicators of the tire. The first is the treadwear index—the higher the number, the more wear-resistant the tire. For example, a rating of 300 might last 50,000 kilometers, while 100 may only last 30,000. The second is called the traction index, which measures the tire's braking grip on wet surfaces, with ratings from AA to C, AA being the best. The third, the temperature index, is divided into A, B, and C grades, with A indicating strong stability under high temperatures. When buying tires, don't just look at the price; choosing a higher traction index based on your driving habits can enhance safety in rainy conditions. I also found that new tires need more initial break-in to avoid damaging the sidewalls with sharp turns.
On long drives, I always emphasize the importance of the 3T index for tires. The treadwear index directly impacts your wallet—higher numbers mean fewer tire replacements. The traction index acts like an invisible safety net, providing better braking stability on wet roads during rain. The temperature index prevents overheating and deformation during high-speed driving. In practical driving, I prefer tires with a treadwear index of 350 or higher, paired with regular tire pressure checks. This index table is a global standard—a quick glance helps you choose the right tire for road conditions. Remember, don’t cheap out on low-index tires; everyone knows safety comes first.
