hello to all somebody to proven nsr: Ultrasoft back tires 19x10 Second generation. Back tires ultrasoft GT 20 12 xs Second generation. They are For races of speed or resistance. I am preparandome spirit Reynard. Body Reynard training 2K Q. New Sport Reynard Chassis. Mortor nc6. New guide spirit screwed. Hollow front axis sloti plastico rims sloti and front Tires fly zero grip17,5 x 9 mm. pinion of 10 and crowns of sloti 26 aluminum teeth. axis sloti and rims sloti and back Tires Fly Racing 19 xs 9 mm. Todavia and proven it is not necessary to put weight to him salu