A high torque capacity infinitely variable transmission of the epicyclic type in which an input rotor is mounted on and rotates with the input shaft. A plurality of discs are rotatably supported by spindles which radiate outwardly from a spider hub which in turn is journaled and freely rotates about a portion of the input shaft. The axis of rotation of these discs lies in a common plane transverse to the axis of rotation of the input shaft and spider. The discs are in tractional engagement with the traction contact path radius of the input rotor and are driven around the traction contact path radius of the non-rotating traction ring thereby causing the discs to rotate about their axis in a direction of rotation opposite that of the input rotor and driving the spider about its axis in the same direction of rotation as the input rotor. Each disc is in driving relationship with a spindle gear. These spindle gears are in driving relationship with a sun gear which is mounted on and rotates with the output shaft. An infinitely variable change in the input/output ratio is achieved by displacing the traction ring axially. A change in the ratio range of the transmission is achieved by varying the pitch diameter ratio of the spindle gears to the sun gear.