man i got some big nuts cuz i got people all over them,
my answer is , depends on the application
for instance, i would not put 13's on a new dodge truck that comes stock with 20's, i would not put 20's on a hopper, i personally feel a 20 is a truck/suv sive and looks odd on cars, but then again it sdepends on what type of car, so after all that is said
it depends on your application, if the topic could be more specific so could my answer
