Tire with pre-stressed toroidal element

A non-pneumatic tire and rim assembly comprising:

• a rim having a pair of wheel flanges, including a first wheel flange and a second wheel flange;
• a non-pneumatic tire having a crown region and a pair of sidewall regions, including a first sidewall region and a second sidewall region, the non-pneumatic tire comprising:
• a pair of beads, including a first bead and a second bead;
• at least one body defining a plurality of body ply layers;
• a toroidal element located between the body ply layers,
• wherein the toroidal element includes inner and outer regions formed by the body ply layers, and a central region located between the body ply layers,
• wherein at least a portion of the central region is more elastic than the inner and outer regions,
• wherein the toroidal element includes a crown portion extending across the crown region of the tire,
• wherein the toroidal element includes a first sidewall portion extending along at least a portion of the first sidewall region of the tire,
• wherein the toroidal element includes a second sidewall portion extending along at least a portion of the second sidewall region of the non-pneumatic tire, and
• wherein the toroidal element is pre-stressed such that the first sidewall portion of the toroidal element exerts a first axially outward force of at least 1000 pounds against the first wheel flange of the rim, and such that the second sidewall portion of the toroidal element exerts a second axially outward force of at least 1000 pounds against the second wheel flange of the rim.