Tire and rim assembly

A tire and rim assembly comprising a rim for a wheel, said rim having a generally cylindrical shape and a pair of radially outwardly extending rim flanges at the edges, a first bead seat on said rim adjacent one of said rim flanges, a second bead seat on said rim adjacent the other of said flanges, an annular tire having a U-shaped cross section with circumferentially extending edges, a first bead portion at one of said edges and a second bead portion at the other of said edges, said first bead portion being mounted on said first bead seat and including a first annular inextensible bead ring with reinforcing plies embedded in and adhered by a bond to a bead covering material, said second bead portion including a second annular inextensible bead ring with reinforcing plies embedded in and adhered by a bond to said bead covering material, said first bead portion being adhered to said rim at said first bead seat by a cement providing a bond with sufficient strength to retain said first bead portion in said first bead seat during operation of said tire in the deflated condition and said bond between said bead covering material and said first bead ring with reinforcing plies being stronger than said bond between said first bead portion and said rim at said first bead seat so that said first bead portion can be unseated from said first bead seat without breaking said bond between said bead covering material and said first bead ring and reinforcing plies during dismounting of said tire from said rim.