Abstract: A bicycle wheel assembly includes a hub disposed coaxially in a metal rim. A spoke unit interconnects the hub and the metal rim. The metal rim defines a tire-retention groove to receive a foam tire therein. The foam tire has an inner section disposed in the groove of the metal rim, and an outer section that projects outwardly from the groove. A tire reinforcing unit is embedded within the foam tire, and includes a non-stretchable strap embedded in the inner section of the foam tire and disposed around the metal rim, and a plurality of angularly spaced apart rigid strings which extend radially from the non-stretchable strap into the outer section of the foam tire.