The RallyX is really a short course truck with a car body on it. As such it uses short course wheels to clear the suspension just like the Traxxas Rally does. I don't know of any drift tires (mounted or otherwise) that fit SCT wheels or 2.8 wheels. There are some 1/8 drift tires out there but you'd need 17mm hex adapters to run them. The other option is stuffing your current wheels and tires into some PVC pipe to make your own drift tires.