Save yourself the trouble of wasting money on foam tires. They DO provide slightly better traction at the expense of everything else. The chunk easily on roar surfaces, which usually destroys the tire, and they wear more quickly for someone who is just bashing around and having fun. This is to say nothing of how deformed them will become without a tire truing machine. Find yourself another good set of rubber tires that have more life expectancy, and go have fun.