Some cone CVT designs use two rollers.[23][24] In 1903, William Evans and Paul Knauf utilized for just a patent with a continuously variable transmission working with two parallel conical rollers pointing in reverse Instructions and linked by belts that might be slid together the cones to fluctuate the transmission ratio. https://gearbox-cvt54207.ageeksblog.com/31717187/gearbox-cvt-things-to-know-before-you-buy