well i finally got 2 see the difference between a 4mil and a 10mil. dammm. i have a 4mil cheetah that runs pretty dam good and raced a 10 mil cub sunday... asphault 1/8 mile....who ever said there is little difference between a 10 and a 4 is a lie. this guy spotted my bike at least 15bikes and caught me before the 1/8 mile..long before the 1/8...i dont have the fastest 4mil but it do run alrite..in my opinion a 4mil should never pull up besides a 10mil hahaha...im sure there are some 4mils that can hang but very few..