What are the speed codes for tires?

[DiSawyer]

Tire speed codes include J, K, L, M, N, P, Q, R, S, T, U, H, V, W, Y, and Z. The maximum speeds represented by J to Y are: 100 km/h, 110 km/h, 120 km/h, 130 km/h, 140 km/h, 150 km/h, 160 km/h, 170 km/h, 180 km/h, 190 km/h, 200 km/h, 210 km/h, 240 km/h, 270 km/h, and 300 km/h, respectively. The letters corresponding to the tire speed rating indicate the maximum speed at which the tire can carry a specified load under defined conditions. Generally, tires with P-T ratings (150-190 km/h) are suitable for small and compact cars, while U-V rated tires (200-240 km/h) are used for mid-to-high-end vehicles. W-Z rated tires (270 km/h+) are designed for large luxury sedans and sports cars. Tires with higher speed ratings tend to have lower durability compared to those with lower speed ratings. This is primarily because higher-speed-rated tires are made of softer compounds, making them less resistant to wear. A higher tire speed rating is not always better—letters further in the alphabet indicate better performance but also come with a higher price.

[LeilaRose]

The speed rating code on a tire is actually the letter on the sidewall, representing the maximum speed the tire can withstand. This is crucial—you can't just opt for a lower-rated tire, as it might lead to a blowout at high speeds. I only learned this last year when replacing my tires. For example, my sedan originally came with an H-rated tire, meaning it can handle up to 210 km/h. If I switched to a T-rated tire, which only supports 190 km/h, it would be very dangerous on highways. The tire shop technician reminded me to always check the vehicle manual's recommendations, as requirements vary by car. SUVs often come with V-rated tires (240 km/h), while performance cars might have W-rated tires (270 km/h or higher). During routine maintenance, inspect the speed rating to avoid safety risks from overspeeding or aging. Remember these common codes: S for 180 km/h, T for 190 km/h, H for 210 km/h, V for 240 km/h, W for 270 km/h, and Y for 300 km/h. Choosing the right one ensures a safer drive.

[Elaina]

The tire speed rating is an indicator marked with letters to denote the maximum speed capability, primarily to ensure safety. If you choose a tire with too low a rating, such as fitting an S-rated tire with a maximum speed of 180 km/h on a sports car that can actually exceed 250 km/h, the tire may overheat and burst under high load. Having driven for many years, I've seen accidents caused by people saving money and choosing the wrong rating—it's terrifying. Standard ratings like H represent 210 km/h, and V stands for 240 km/h, which can be found on the tire sidewall, e.g., P235/65R17 V. When selecting tires, always check the vehicle manual for requirements. Family cars often use H or T ratings, while SUVs may require higher ones. A mismatch can affect handling and braking, especially before long trips—always verify the speed rating to ensure it matches the vehicle's speed limits.

[EllianaFitz]

The speed rating is a letter on the tire indicating the maximum speed. For example, H stands for 210 km/h, V for 240 km/h, and it's marked after the tire size on the sidewall. I often remind car owners during repairs to choose the rating according to the manufacturer's manual. Generally, H is sufficient for regular cars, while sports cars may require W or Y. A higher rating wastes money, while a lower one is dangerous and can lead to loss of control at high speeds. Incorrect ratings may also cause faster tire wear. Always check the original rating when replacing tires—it's a simple verification step.