Abstract: A a crosslinkable polymer composition which provides a crosslinked product capable of both heat resistance and re-formability, a crosslinked polymer material capable of both heat resistance and re-formability, and an insulated wire and a wiring harness including the crosslinked polymer material. The crosslinkable polymer composition includes: ingredient A from which metal ion is released by heat; and ingredient B including an organic polymer having a side chain, including an electron-withdrawing substituent group capable of forming an ionic bond with the metal ion, and when B is crosslinked via the metal ion to form a crosslinked product, the product has a flow starting temperature of 190° C. or higher and 300° C. or lower. The crosslinked polymer material includes the crosslinked product of the crosslinkable polymer composition. The insulated wire includes a wire conductor, and an insulation coating including the crosslinked polymer material, and the wiring harness including the insulated wire.

Abstract: An improved steering system for a small-sized light-weight wheeled vehicle, such as an all-terrain vehicle being equipped with balloon tires, which comprises independent steering mechanisms adapted respectively to the steering operation of the front and rear wheels of the vehicle.