Between the discs are rollers, which fluctuate the ratio and transfer power from just one facet to the other. If the rollers' axes are perpendicular to your axis in the discs, the helpful diameter is the same for the enter discs plus the output discs, causing a 1:one travel ratio. https://gearbox-cvt41627.pointblog.net/top-latest-five-gearbox-cvt-urban-news-77242290