Abstract: A bicycle having a widened rear wheel preferably includes an existing bicycle, a double tire rear wheel, a widened crank tube, a widened crank and widened rear fork. The existing bicycle includes a bicycle frame, a front wheel, handlebars, and a seat. The bicycle frame includes a frame unit and a crank set. The frame unit includes a base frame portion, a front fork and a rear fork. The base frame portion includes a top tube, a seat tube, a down tube and a crank tube. The crank tube is replaced with the widened crank tube. The rear fork is replaced with a widened rear fork. A crank of the crank set is replaced with the widened crank. The widened rear wheel preferably includes three bicycle tire rims, a plurality of spokes, two tires and a lengthened rear wheel hub.