Abstract: The present application relates to an insert, a protection device, a wheel and a vehicle. The insert is used for a wheel, the wheel comprises a rim, spokes, and a tire, and the insert comprises: a body provided on the rim and/or the spokes; and a protection portion provided on the body, the protection portion at least partially shielding an outer surface of the tire. The technical solution of the embodiments of the present application can form a certain protection effect on a tire of a wheel, improve the reliability and safety of the wheel, and further improve the aesthetic appearance of the wheel.