I have my own mini "1/18" and I agree with RC Dad 110%. I went to scale mostly so on paper 4' wide lanes looked more then enough. During building I quickly realized this is far tighter than I first thought. So I bumped it up to 5 1/2 feet wide. Its great with my brushless vendetta but if there was 6-7 people on it, it would be mayhem. You better off making it to big then to small anyhoo. Atleast then you can run 1/10 scales on it aswell. I say go 8' wide right off.