All-terrain bicycle

An all-terrain bicycle comprising a bicycle tubular frame defined by a main frame section and a front fork and a pair of rear forks to which is removable secured a front and a rear wheel;

• said wheels being formed of plastics material and defining a hub, a circular outer molded solid tire and an intermediate connecting framework;
• said outer molded solid tire being a one-piece tire defining, when viewed in transverse cross-section, a central projecting dome merging into opposed tapered wings which are recessed from the top of said dome, and an integrally molded connecting formation under said dome secured to an outer rim of said connecting framework;
• said dome defining a circumferential central rib about said outer molded tire for the displacement of said bicycle on a hard surface with said wings spaced from said hard surface, said wings constituting a wide tire support surface together with said central rib for the displacement of said bicycle on soft surfaces, said main frame being formed from a unitary tubular piece which is bent to form a straight top cross-bar section, a head tube connecting section, a down-tube section and an upright seat support section, an end of said top cross-bar being welded to said upright seat support section adjacent to an open top end thereof.