Re: Boat trailer up on blocks during winter?
I've done this for the past 6 years and truly believe that I have avoided the trailer tire tragedies others have suffered. I have not had a blow out, tread separation or other issue since I started jacking up the trailer between uses. I don't do it if the trailer will be sitting for a week or less but otherwise I do. My trailer has a separate under-frame that holds the running gear. The back beam is a heavy channel that sits below the main frame. I crank the tongue jack all the way down, put the jackstands under the heavy channel and crank the jack back up. It takes almost all the weight off the tires. I can almost spin the front wheels and the rears are just touching the ground. I also take the tires off the trailer for the winter and store them in the garage. Then I just leave the trailer on the stands and it sits there for 6 months. I have Goodyear Marathons on my trailer that are now 4 years old and have close to 10,000 miles on them and they still look very good.
It only takes me 15 minutes to do it and I think it helps.