Guys, I'm not sure if they make the truck too wide for ROAR Rules or not, but I'd recommend the DE Racing +3mm Borrego wheels. They are really nice wheels, solid, keep dirt out, strong, and come in cool colors, have a nice bead too. I wish they came in a +2mm.. That would be perfect. It makes the truck slightly wider, keeps the inner wheel fins from rubbing, and the tires WILL still fit inside the body without severe rubbing when the suspension compresses.
Some of the stock offset wheels will rub slightly, and make noise or at least be annoying as hell. If you do run stock SC10 4x4 wheels, a +1 wider Hex might be beneficial. I haven't tried SCTE wheels, but I'm pretty sure they are the same as SC10 4x4.
My recomendation is +3 DE wheels, Aluminum horn, Pink springs, rear skid plate, better clamping hexs, good/fast Servo, definitely get a sensorser motor & ESC set up. I'd start with a 16 tooth pinion for normal size tracks. Or a 17 for big tracks. 18 for Huge tracks.
The HobbyWing SCT Pro XeRun Combo includes a 15T Mod 1 pinion FYI.