Variable PulleyPULLEY AND SPEED SHIFTING SYSTEM AS NARROW AS THE BELT
YOU CHANGE THE GEAR RATIO BY SMOOTHLY CHANGING THE DIAMETER NO AXIAL DISPLACEMENT NO EFFORT TO CHANGE THE GEAR RATIO NO EFFORT TO KEEP THE SAID DIAMETER NO NEED FOR A TRAPEZOID BELT NO HEAVY AND BULKY CONE
JUST A NARROW PULLEY |