I'm looking to replace a set or slip on ski wheels. Does anyone have any experience with the Caliber sled wheels. I will use them to move sleds w/o ski wheels in and out of my trailer and garage. I have Rouski wheels on my own sled, but with a 3 place trailer. I trailer friends and family that don't have wheels. Plus working on other sleds, that have to drive in and out of my garage to be worked on, etc. I want to know from people that have them. Can you easily load and unload on a trailer? Can you back up with them, like back out of a trailer? I also will be driving across a gravel drive way. Thanks in advance for your responses.