Our ZBROZ HD Pro Max Upper Radius Rods takes strength to the next level. It was built to take on extreme mountain trails, rock crawling, and desert/dune rally action with a beefier rod diameter for added strength and durability. The HD Pro Max Upper Radius Rods have been built exceed the limits of your RZR. We kept the trail rider and rock crawler in mind by providing a simple bolt-on system to easily upgrade your ride with high strength durability.