Originally Posted by Paratrooper
Yesterday I found that the inflatable tire on my launching cart had packed up. I have also found that it is nearly impossible for me to get the Surprise back on the cart when trying to retrieve the ship if the cart did not float up under the ship. So trying to find a wheel that would not go flat yet float proved to be a bit of a challenge.
I finally found something that works! I got this from Tractor Supply but I am sure others carry a similar tire and wheel. It does not require air but it is filled with some sort of inner material that still allows the thing to float. The solid rubber tire types are nothing more than round rocks with holes in them, these work.
If you slime your inflatable tires they will not go flat. Use about 1/3 of the tires volume with slime.