I have a few Hilliard clutches on various pieces of equipment ,including my homemade snow dog ,I have had zero issues with them ,and I use the snow dog to haul gravel to my camp in the winter .I would think that running a full snowmobile track ,a 240lb guy ,a 6’sleigh ,and 6 5gallon pails of gravel at a time through snow and ice would be a descent work out for any clutch ,and the Hilliard has been on it now for 3 winters .