Greetings, I was thinking about sending my boys cars to proxy race after the Cub Races this weekend. We built 9 cars, some with DDH Rage X wheels and some with Nitro wheels. Which wheels fit which classes of racing? Needless to say the Nitro wheels passed inspection for our Pack and District, obviously they are faster cars. We would like to send them to the Cabin Fever. A clarification would be appreciated to get the cars in the correct class.