Run-flat properties

The capability of a deflated tire to operate effectively, i.e., to permit further driving. To achieve this, the following must be fulfilled: the tire beads must be retained against the rim flanges and on the rim bead seats when the tire deflates; the tire must be able to support all possible stresses imposed by deflation: the tire must remain undamaged by internal friction and heat generated when running flat; the tire should be able to self-seal any punctures, so that the remaining air will be trapped and heat will be generated to reinflate the tire within limits.