The 13" Bassett Legends and Mini-stock series wheels use the Inertia Advantage five-spoke center design and a high quality spun-form shell. The brake cooling holes feature almost 9 square inches more area, while the weight placement in the center helps the wheel rotate faster. Also, strict quality control means run out is much lower than other Legends and Mini-stock wheels on the market. Light weight and low run out (under .030) thanks to spun-form wheel shells produced in-house Reinforced torque ring and forged coining on center increases durability. The 5/8" valve stem hole is located behind the center to avoid clipping Larger brake cooling holes reduce brake temperature and prevent fading during long feature races NOTE: The 13x6, 13x7 and 13x8 wheels feature tire safety bead bumps to retain the tire when using low air pressure on dirt tracks. Uses 45 degree stock car racing lug nuts not oem stock nuts. Sold separately.