Planetary transmission with continuously variable transmission ratio

A planetary transmission having a continuously variable transmission ratio, said transmission comprising:

• two axially spaced, coaxial sun wheels having sun wheel circumferential surfaces and that are rotatable independently of each other;
• a ring wheel having an internal circumferential surface positioned coaxially with the sun wheel axis;
• and planet wheels having planet wheel circumferential surfaces, each of which planet wheels is in frictional contact with the internal circumferential surface of the ring wheel and with the sun wheel circumferential surfaces;
• and a web element for rotatably supporting the planet wheels, wherein the planet wheels are each rotatable about an associated planet wheel axle that has at least one axial end carried by the web element and that it is guided by the web element for movement in a radial direction relative to the sun wheel axis.