I think most of the electric offroad stuff has slippers.. not sure exactly which models, but I know some do.. Someone who knowswhich ones should be along shortly to help ya out! Welcome to the forum!! (If ya want to take the long way, you can check out www.urchobby.com and click on the "products" ->"replacement parts"-> "Redcat" links, and scan through the part lists for the various trucks/buggies and see which ones list a slipper as a replacement or upgrade? But like I said, it'd be the looooooong way to find out..)