Tread supporting ring for use with a rim for a tire having two beads

摘要

There is disclosed a tread supporting ring (3) for use with a rim for a tire having two beads comprising a sulfur cured rubber composition composed of: (A) 65 to 95 parts by weight per 100 parts by weight of rubber (phr) of a first rubber containing olefinic unsaturation; and (B) 5 to 35 phr of a rubber having nylon side chains grafted thereto, and (C) 1 to 40 phr of at least one nylon.