Patent ID: 7055565

Claim:
A support ring comprising a radially inner annular portion seated on a mounting portion of a wheel rim, a radially outer annular portion for supporting an inside of a tread portion of a deflated tire, and a supporting wall extending from the inner annular portion to the outer annular portion, wherein the supporting wall comprises a main wall extending continuously in the circumferential direction in a trapezoidal waveform, and axial walls extending axially outwardly from the main wall, said main wall is made up of first circumferential walls on one side of the center line of the inner annular portion, second circumferential walls on the other side of the center line, and first oblique walls and second oblique walls extending between the first circumferential walls and second circumferential walls, said first oblique walls and second oblique walls are disposed alternately in the circumferential direction, and with respect to the circumferential direction, the first oblique walls are inclined toward the opposite direction to that of the second oblique walls, and said axial walls are first axial walls extending axially outwardly from both ends of each of the first circumferential walls, and second axial walls extending axially outwardly from both ends of each of the second circumferential walls.