I've been into Nitro for about 3 months. We have an oval track at are LHS and races will be scheduled in the spring and summer. I have a Traxxas Nitro Sport and will be racing for the fun. Right now we just race each other informally a few laps on the weekends. I put some Pro Line Gladiators on the rear and Pro Line directionals on the front. Our track is mostly Georgia clay. Someone told me I should run foam tires on this track. Where could I get foam tires for the Traxxas Nitro Sport? Also, is that a good recommendation to go with foam tires on the Nitro Sport?