I haven’t tried this on a unicycle but I did it on an old BMX bike and never had a flat again with that innertube. I gave it to a friend about three years ago and it still hasn’t gone flat.
Here it is: First you take an old innertube (it doesn't matter if it's popped) And cut it around the inside edge. Then you put it around the inner tube that you're going to use. Next you get an old worn down tire (it works better if you us one thats a smaller diameter than the tire you're going to use) and put it around both inner tubes. Then put the "outside" tire around that and stick it on the rim. It will probably be the greates acomplishment of your life if you can get it on your rim. So anyway I hope that can help someone.
>
>rhysling wrote:
>> Keep in mind that Phil is a one-inch-tall Lego-man: this thorn would
>> be about 2 microns in length.
>
>…And how do you know I hadn’t already taken that into account*, and
>said thorn was actually the equivalent of ALMOST SIX FEET LONG!!!???
Phil, you could MAKE it the equivalent of almost 6 ft by combining it
with your legomen in another great animation vid. I’m also noting that
you apparently have a better calculator than rhysling