This wheel features Bassett's patented Inertia Advantage center which concentrates the strength and weight of the wheel towards the center which makes them 5% faster than any other wheel currently available. Unique 5-spoke design provides 10 more square inches of brake cooling area. Big tire bead, locks tire in place. Spun-form rim shell equals higher steel yield strength and lower runout. Lightest weight allowed by IMCA/WISSOTA.