Patent ID: 8672339

Claim:
A non-motorized sand-rideable bicycle comprising: an open frame having an expanded width for accommodating oversized tires, wherein the open frame comprises laterally spaced struts, a front yoke rotateably supported on a forward portion of said frame, said open frame including spaced-apart rear extension arms; a plurality of balloon tires comprising a front balloon tire rotateably attached to said yoke, and a pair of spaced apart rear balloon tires disposed between and rotateably attached to said spaced-apart rear extension arms; a drive sprocket rotateably attached to said frame, said drive sprocket being disposed within said open frame between said laterally spaced struts; pedals attached to said drive sprocket and laterally disposed on opposing sides of said laterally spaced struts of said open frame; a rear sprocket between said spaced apart rear balloon tires coupled to drive said rear tires; a drive chain coupled between said drive sprocket and said rear sprocket; a seat attached to said expanded open frame; wherein a width of said front balloon tire and said pair of spaced apart rear balloon tires being of a size and inflated to a pressure to ride up and over loose sand, such that said sand-rideable bicycle can be started with minimal effort by an individual on said seat and such that forward motion of said bicycle on said loose sand is not impeded by a minimal penetration of said front balloon tire and said pair of spaced apart rear balloon tires into said loose sand; wherein each rear balloon tire of said pair of spaced apart rear balloon tires includes a plurality of transverse exterior ribs disposed about a circumference of each said rear balloon tire, and further including a plurality of annular ribs disposed around a periphery of each said rear balloon tire that extends radially above said plurality of transverse exterior ribs so that said plurality of transverse ribs do not touch a hard surface when the bicycle is driven over said hard surface, such that said bicycle may be ridden vibration-free over said hard surface with said annular ribs preventing said transverse exterior ribs from touching said hard surface; and wherein said plurality of transverse exterior ribs extend between each said annular rib of each said rear balloon tire and further extend outwardly toward each sidewall of each said rear balloon tire so as to extend the plurality of transverse ribs outwardly beyond each outer-most annular rib of each said rear balloon tire.