Some cone CVT models use two rollers.[23][24] In 1903, William Evans and Paul Knauf used for any patent with a consistently variable transmission working with two parallel conical rollers pointing in opposite directions and related by belts that can be slid along the cones to range the transmission ratio. Precise https://gearboxcvt93792.blogofchange.com/33265481/gearbox-cvt-for-dummies