A drive mechanism for a cycle , the drive mechanism comprising an input assembly , an output assembly , and a transmission system functionally connecting therebetween, wherein: • said input assembly defines a rotational drive axis via which an input force is provided, and first and second drive points spaced from said drive axis, and is configured to harness said input force to produce an angular motion of said drive points about said drive axis, said input assembly comprising first and second drive plate members rigidly attached to each other, configured to rotate about said drive axis and each associated, respectively, with one of said first and second drive points; • said output assembly defines a rotational wheel axis and first and second wheel points spaced from said wheel axis, and is configured for being driven by the angular motion of said drive points such that said wheel points rotate about said wheel axis, said output assembly comprising first and second wheel plate members rigidly attached to each other, configured to rotate about said wheel axis and each associated, respectively, with one of said first and second wheel points; and • said transmission system is configured for facilitating transmission of motion from said input assembly to said output assembly , and comprises a first transmission member pivotally articulated, at a first end thereof, with respect to said first drive point and, at a second end thereof , with respect to said first wheel point , and a second transmission member pivotally articulated, at a first end thereof, with respect to said second drive point and, at a second end thereof, with respect to said second wheel point , each of said transmission members being formed with a round plate-receiving aperture at each end thereof receiving one of said plate members therein, such that rotation of each drive plate member about the drive axis operates a respective transmission member to rotate a corresponding wheel plate member about the wheel axis . • said input assembly defines a rotational drive axis via which an input force is provided, and first and second drive points spaced from said drive axis, and is configured to harness said input force to produce an angular motion of said drive points about said drive axis, said input assembly comprising first and second drive plate members rigidly attached to each other, configured to rotate about said drive axis and each associated, respectively, with one of said first and second drive points; • said output assembly defines a rotational wheel axis and first and second wheel points spaced from said wheel axis, and is configured for being driven by the angular motion of said drive points such that said wheel points rotate about said wheel axis, said output assembly comprising first and second wheel plate members rigidly attached to each other, configured to rotate about said wheel axis and each associated, respectively, with one of said first and second wheel points; and • said transmission system is configured for facilitating transmission of motion from said input assembly to said output assembly , and comprises a first transmission member pivotally articulated, at a first end thereof, with respect to said first drive point and, at a second end thereof , with respect to said first wheel point , and a second transmission member pivotally articulated, at a first end thereof, with respect to said second drive point and, at a second end thereof, with respect to said second wheel point , each of said transmission members being formed with a round plate-receiving aperture at each end thereof receiving one of said plate members therein, such that rotation of each drive plate member about the drive axis operates a respective transmission member to rotate a corresponding wheel plate member about the wheel axis . <EOS>