the track i race on is like a ruffed up concrete i suppose. it is not real ruff just not smooth. to tell you the truth i dont know what associated front and rear ends it has but i would guess 1/10 though i could be wrong. thanks for help on tires though more info would help. i would like to know more about the caps, can i buy just the rubber sleeve and put it on any foam tire, if so who makes it.