Performance Machine Off-Road Wheel Spacers are CNC machined from billet 6061-T6 aluminum and provide the backspacing you need to get the desired track width and tire stance to improve the look of your UTV while also adding stability. PM Off-Road Wheel Spacers come in 1", 1.5" and 2" widths for 4/137 and 4/156 bolt patterns. The wheel spacer comes with M12-1.5 wheel studs installed and clear zinc open lug nuts to secure the spacer to the factory hub.