The commonest type of CVT makes use of two pulleys linked by a belt or chain, having said that, several other styles have also been applied. The friction bands tend to be useful for manually picked gears (which include minimal selection or reverse) and operate on the planetary drum's circumference. https://manuelpwwwu.full-design.com/new-step-by-step-map-for-gearbox-auto-76521635