This is a 15" x 6" steel wheel from a mid 80's Chevrolet or GMC truck. The stamp on either side of the valve stem is K485 9 3 XAH or K486 10 2 3XAH. Back space is measured to the inside of the tire bead. The center hole is round without "pinch" from the factory. Good condition . Two are available with these markings from the same truck.