This is a heavy duty 15 inch 6 Lug White Modular Style trailer wheel. The 6 Lug Pattern is very standard in the trailer industry. These are typically mounted to 225/75 15 trailer tire sizes on 5,200lb-6,000lb capacity trailer axles. In most cases if you have a white modular wheel you have a utility trailer, enclosed trailer ,or equipment hauler.
15 inch by 6 inch 6 Bolt (6 on 5 1/2)
4 1/4 Diameter Center Hole