THE TSR CHOPPER HAS THE TWO SPEED FEATURE, HOWEVER THE TWO PUllIES MUST BE CHANGED FROM TOP TO BOTTOM. WE HAVE MADE IT EASY BY lEAVING THE HUBS ON THE SHAFT, AND JUST SWITCH THE SHEAVES AROUND. THE DUAl SYSTEM PUllIES WOUlD ADD A CONSIDERABlE AMOUNT TO THE COST OF THIS UNIT. A GEAR BOX THAT COUlD BE SHIFTED IS NOT NOT AN OPTION.