The Hot Wheel decal is attached to the wheel/rim by self adhesives. When the temperature of the wheel reaches 250 degrees, the temperature-sensitive white arrow changes and remains bright orange, warning of an overheated wheel condition. After the wheel problem has been corrected a new Hot Wheel decal must be installed.
While Hot Wheel will not indicate every instance of a wheel end component malfunction, it will indicate excess temperature for prolonged periods that could cause decreased function or failure of wheel end components.
Pre and post trip inspections provide the driver with an opportunity to visually inspect the conditions of the Hot Wheel indicator label positioned between the wheel studs on the vehicle.