Our Standard 140lbs – 220 lbs deliver much improved performance over your stock OEM shock springs. Stock springs are too soft for most riders. Spring Kits are one of the most under rated suspension upgrades you can make, so don’t let a one-size-fit-all suspension setup limit your riding experience and progression. Applications • Polaris RMK AXYS 39” (2016-2018) Weight Ranges • 140lbs – 220lbs