Give your Pro RMK, AXYS RMK, M-series, HCR, Proclimb, or Viper Chassis snowmobile the added benefit of a flexible rear suspension arm. with 6* in either direction the IceAge Pro-motion provides the flex you need to carve with ease. Reduced effort to sidehill and easier initiations of carves are just a few of the perks of this bolt on accessory for your snowmobile suspension. 6061 Body and 7075 shafts ensure maximum strength. While the idea was inspired by the Ski-Doo T-motion, we have redesigned it to allow for more flex, more strength, and better feel.