While the big picture view may not show much has changed with the Polaris PRO RMK line other than the addition of the 850 Patriot motor, in reality there have been a host of upgrades made to the mountain maven fleet. The biggest being the introduction of an all-new front suspension dubbed the React. Touting new geometry, a revised sway bar, and an adjustable stance going from a narrow 36-inches to 38-inches, the forged A-arm and spindle system is stronger and further improves the deep snow handling of the Rocky Mountain King. With a day in the saddle in the Idaho backcountry, our mountain crew found the changes to be seamless. As one tester put it, “You can’t quite put your finger on it at first, but the new RMK just works better in every situation with less effort.”