RE: TREADED v SMOOTH wheels
I have several tire types, foam/rubber and threaded and unthreaded. I really don't see much difference in any of them as far as traction in normal flying. Maybe there is one, I just haven't thought about it much. I have heard/seen the way foam tires can buckle a little on a sharp turn on pavement, but that just means less speed before turning so sharp. The only negative I have heard on threaded vs unthreaded is the threaded tires can pick up small debris that can make tire cleaning difficult. If you have a paved runway that gets real soft in hot weather, this can be a problem. Otherwise, I use what comes with the plane or what I have around the shop.