Question: What are the different types of performance tires?
Answer:
Performance: Designed for drivers wanting to enhance the look and low-speed traction of their vehicles.
High-Performance: Designed to enhance high-speed handling and stability.
Ultra High-Performance: Designed for extreme performance and one of the fastest tires available on today’s most sophisticated sports cars and sedans.
Competition: Built for racing classifications. These tires, while street legal, are impractical for most users because of their racing compounds and groove -free design. 

Question: What are tire speed ratings?
Answer: Tire speed ratings were originally developed in Europe as a way to assist high performance vehicle owners when choosing replacement tires to match the speed capabilities of their vehicles. Tire speed ratings should never be associated with the ability of the vehicle to handle the speed for which the tire is rated.Today’s tires are marked with letters to indicate their speed rating. In the example below, H is the speed rating. Speed ratings are based on laboratory tests which relate to performance on the road. Tires may be marked with one of these speed symbols, M, N, P, Q, R, S, T, U, H, V, W and Y to identify the particular tire’s speed rating. Additionally, the letter Z may appear in the size designation (see chart below).