The wheel includes a tire, a rim, two groups of supporting members. The tire is coupled to the rim. The groups of supporting members are oppositely positioned and received in the tire. Each group of supporting members are separately positioned from each other. The supporting members of each group are coupled to an inner surface of the tire by injection method. Central axes of the supporting members of each group are coincident or parallel. A central axis of each supporting member is coincident with or parallel to a central axis of a central axis of the tire.