Keller - POLARIS Ranger XP 900 BALL JOINTAn Innovative, Two Piece Ball Joint The biggest problem with OEM ball joints is that theyre held in by a flimsy snap ring. All it takes is one big hit to push right past it and put a stop to your ride. Thats what Keller Ball Joints are built to fix. They use a threaded chromoly housing that wont pull out just from hard impact or running huge tires. Its no wonder why the original Keller design is still the best for your Polaris Ranger XP 900. A Two