Review on KSP ATV Wheel Spacers 4x156mm, 2-Inch with 12x1.5 Studs - Fits 2013+ Polaris Ranger, 2014+ Polaris RZR XP 1000, 2015+ Polaris RZR - Includes 3/8“-24 and M12x1.5 Lug Nuts (4pcs) by Jayshawn Cuatlayol

For mounting 2017 27" RZR 1000S wheels with 12mm studs to a 2015 rzr 570 with 3/8" studs. Nuts were included in both sizes. Only four sprockets could only hook about 3/4 of the nut threads due to the 3/8 rear studs (the holes in the gasket need to be milled deeper). So far so good after 400km. It is also necessary to use a thin head to go through the holes in the gasket, which can be a standard no-strike head. Note that the 1.5" width also adds stability to this 570 rzr trail compared to the extra 3" width.