I currently have 13t front, stock rear and 18" rear tires and this thing is terrible for trail riding, I hit the skid plate on everything. The motor is a 4mil stroker with toomey t5 exhaust so I think I have enough motor for some larger tires. I just trail ride this thing, no racing. I currently have 19-6-10's in the front and 18-10-9's in the rear. I don't want to buy new wheels, just tires but not sure what sizes. I am thinking kenda kutters, kenda bearclaws, or the holeshot gncc's but I am open to ideas I just want a good all around trail tire that is tough.