Supporter for run-flat tire and pneumatic run-flat tire using the same

摘要

Provided is an annular supporter for a run-flat tire which comprises a supporting part and a leg part and which can support a load in run-flat running, wherein the leg part comprises a rubber composition comprising a rubber component which contains 60 mass parts or more of a conjugate diene base rubber such as isoprene rubber or natural rubber per 100 mass parts of the rubber component.