http://www3.towerhobbies.com/cgi-bin...?&I=LXPEU3&P=7 those are my favorite 40 size tires, the race compund ones are so sticky they handle better than my phaltlines or anything. I gorilla taped them twice around and they can handle a 1 on 6s without balooning too bad or popping off the rim like most of my other tires did