A support ring for vehicle tires is disclosed. The support ring is to be mounted on a tire wheel for support of the underside of the tire when the tire is operated at underinflated conditions. The support ring has a base, a cap, and a series of supporting arches extending between the base and the cap. The highest point of the arch contacts the support ring cap. During load, the arch flexes and transmits the load force along the arch sides and to the base of the support ring.