The Gullwing Sidewinder II's are a truck of their own. With an additional kingpin they are unlike anything that has come on the longboarding market. The second kingpin allows the rider to make insanely tight turns. Once the first (top) kingpin is turned at max capacity the second kingpin is initiated allowing for an even tighter turn than any other truck could manage. Because of the huge turning radius riders tend to turn to much at high speeds causing them to lose traction. For this reason I would not recommend the Gullwing Sidewinder II's for downhill longboarding. If you want amazing carving ability these are the trucks for you.