Drive Train for a Bicycle

A drive train for a bicycle, comprising:

• a pedal crankshaft (10);
• a driven shaft (12);
• a gearing (14) comprising a first planetary gear set (20), a second sun gear (32), and a third planetary gear set (40), the first planetary gear set (20) comprising a first sun gear (22), a first planet carrier (24), and a first ring gear (26), the second planetary gear set (30) comprising a second sun gear (32), a second planet carrier (34), and a second ring gear (36), the third planetary gear set (40) comprising a third sun gear (42), a third planet carrier (44), and a third ring gear (46), the first planet carrier (24) permanently connected to the second ring gear (36) for conjoint rotation, the first planet carrier (24) connectable to the third sun gear (42) for conjoint rotation, the first ring gear (26) permanently connected to the second sun gear (32) for conjoint rotation, the third planet carrier (44) connectable to the pedal crankshaft (10) for conjoint rotation, the third ring gear (46) connectable to the driven shaft (12) for conjoint rotation, the second planetary gear set (30) nested radially outwards with the first planetary gear set (20);
• and
• a first electric machine (EM1) with a first motor shaft (W1) that is permanently connected to the first sun gear (22) for conjoint rotation,
• wherein the drive train is configured for providing a continuously variable transmission ratio between the pedal crankshaft (10) and the driven shaft (12).