Abstract: The invention relates to a toroidal drive having a continuously variable ratio and an output pulleys disposed co-axially to an input pulleys, semi-toroidal faces facing each other and at least one friction roller which rolls on the toroidal surfaces and transmits a torque from one pulleys to the other, wherein the friction roller is rotatably mounted in a roller carrier which is pivotally mounted around a swivel axis across an input shaft in a holding device in a housing and is adjusted and at the same time swivelled by a hydraulic actuation device having a cylinder and a double-acting piston in direction of the swivel axis. It is proposed that a valve device (28) with a piston slide valve (33) produce by means of leading edges (38,39,40,41) a pressure difference proportional to the desired torque to be transmitted and with which are loaded both piston sides (24, 25) and front faces opposite each other (42, 43) of the piston slide valve (33).