an energy efficient tricycle has a frame , fork and handlebars connected to hold a front wheel and two rear wheels . a power and transmission assembly means is mounted on the frame to provide power to both rear wheels . a pair of pedals are independently operable and used to provide the torque needed to propel the tricycle . a motorized embodiment is also provided to provide additional power when needed or to completely motorize the tricycle . the pedals are mounted so that they travel in a vertical path . the handlebars , front wheel and both rear wheels are foldable to allow the tricycle to fit within a vehicle . the tricycle has a very low center of gravity . a seat is provided in one embodiment to allow a user to sit and operate using a motor .