A bicycle in which the frame is so constructed that the pedal crank is displaced forwardly of the center of the back wheel by a distance equal to at least twice the radius of the back wheel, and the rear frame member has a length equal to at least twice the radius of the back wheel, and the steering column housing is slanted at an angle of between 62.degree. and 58.degree. to the horizontal, and the saddle support column has a length equal to between 1.2 and 1.4 times the radius of the back wheel, and terminates at an upper end located approximately perpendicularly above the intersection between the rear frame support, and the periphery of the back wheel, and the saddle support column is slanted at a lesser angle than the steering column housing of between 40.degree. and 44.degree. to the horizontal, and including a back rest extending upwardly behind the saddle.
A bicycle which comprises a triangular frame, a front fork including a bent portion with an vectorial angle of 90.degree., wherein the length of the upper portion of the front fork being longer than that of a lower portion of the front fork, and a vertical arm extends from the lower portion end thereof, and a rear fork which has bent portion with a vectorial angle of 90.degree., wherein the length of the upper portion of the rear fork is shorter than that of the lower portion of the rear fork, whereby the bicycle is accelerated the forward moving speed by the bicycle rider.
A recumbent bicycle that has a short main frame, a small front wheel, a hub and crank that is in close proximity of the steering tube, and an aesthetically designed and integrally mounted shock absorber seat.
A recumbent electrically power-assisted bicycle which permits a shortened wheelbase by positioning the rider in an adjustable seat above the rear wheel. The battery, motor, and controller comprising the power assist system are mounted at the front of the bicycle's frame so as to provide stability, and also provide power assist to the bicycle under startup and high pedalling load conditions.
This bicycle, novel in both functionality and design, is a modified upright bicycle, which, because it incorporates a seat which is adjustable along an inclined Seat Beam, provides optimum dimensions for each individual rider. In addition, it exhibits improved safety, maneuverability, comfort and efficiency of operation.
A 26-inch springer fork is bent to produce a forward curve in the furcations or arms of the fork. The curve has a bending radius of substantially six inches, and the angle between the arms and the main body of the fork is less than a right angle. Typically, the angle of bend is on the order of substantially seventy-five degrees. When mounted on a bicycle, the curved fork causes the front wheel to extend forward in front of the bicycle, and gives the bicycle a longer, lower look, thereby emulating what is known as a "low rider." The struts of the springer fork are shortened to accommodate the bend. The springer fork has a steer tube provided with a threaded member at the bottom thereof for mounting a fender. An angulated washer is provided for matching a mounting screw to the inner curved surface of the fender.
