Polaris RZR 900 Rear A-Arm Bushings by SuperATVWhy We Make Them When you're replacing a wear and tear item, it's in your best interest to replace it with an upgraded material that gives you a longer lifespan for your A arm bushings. At SuperATV, we utilize UHMW for our top of the line A arm bushing kits. Why UHMW UHMW is your best choice for long last A arm bushings. UHMW is a low wear material, ensuring you more miles than your factory bushings. What allows for it's low wear properties is in part