The pulley technique within a CVT consists of two pulleys, one linked to the motor and the opposite on the transmission. The 2 pulleys are linked by a belt or chain. The pulleys are shaped like cones, as well as their diameters could be adjusted to change the gear ratio. https://cesardkmlk.mdkblog.com/40020269/the-single-best-strategy-to-use-for-gearbox-cvt