Vehicle wheels

The assembly of a pneumatic tire and a vehicle wheel, the tire comprising tread and sidewall portions and bead portions at the radially inner peripheries of the sidewall portions;

• the wheel comprising a disc and a rim, the rim comprising a pair of bead seat portions on which the beads of the tire are respectively seated, a pair of bead support flanges on the axially outer sides of and integral with the bead seat portions and extending radially beyond the bead seat portions adjacent the axially outer sides of the tire beads;
• a well-less base portion between said bead seat portions, the rim comprising two parts separable in a diametral plane between the bead seat portions to permit tire mounting and dismounting with the base portion being of diameter such as to prevent mounting and dismounting of the tire from the rim without separation of the parts thereof, an annular tire support member separably surrounding the base portion of the rim, said support member comprising a foot portion extending axially of the rim in contact with the base portion, a web portion extending radially outwardly of the base portion of the rim from one end of the foot portion and an annular tire support flange connected at one of its axial ends to the radially outer end of said web portion to extend from said web portion in cantilever fashion generally parallel with the rim axis at a position radially beyond the radially outer ends of the bed support flanges and spaced from the interior of the tire when the latter is in a normal state of inflation, said support flange being positioned to engage and support the inner surface of the tread portion of the tire when the latter is wholly or partially deflated, the two parts of the rim being separable adjacent one of the bead seat portions thereof, the base portion of the rim being formed in the part which comprises the other of said bead seat portions and having intermediate its ends a deformation against which the foot of the support member is locatable to prevent displacement of the support member axially of the base portion between said deformation and the tire bead on said one bead seat portion.