Get some 12mm to 17mm hex adapters and run some GRP belted radials. When you get the adapters though, make sure they are the 12mm recessed kind so your wheels are secure and dont wobble. I bought the wrong adapters at first so learn from my mistake. The 1/10 slicks that i have are a tad smaller than the GRPs so they will work. PM me and ill show you my 2 speed run cars TC7.1 and B5M