The present invention is a gear system generally having a driven gear, rotatably mounted on an axis, having teeth defined by unique geometrical profiles; a driving means contacting the teeth of the driven gear; and round pins or spheres for engaging the teeth of the driven gear rotatably mounted on the driving means, the round pins or spheres for engaging the teeth of the driven gear roll along a profile of the tooth of the driven gear; and the gear system has a variable pressure angle and a variable contact ratio.