A bead of a tire comprises a pair of beads interiorly inserted with a plurality of annular members, and the annular members are mutually parallel. Each of the annular members is made of a plurality of flexible steel cords twisted together, and the diameter of the respective flexible steel cords ranging from 0.05 mm to 1.0 mm. The tire is flexible and can be folded/rolled into a compact package for easy transportation and storage. In addition, a reinforcing member is made of cotton or other materials and can be rounded with the annular member for improving the joint strength of the flexible steel cords.