Does anybody know if there's a noncircular inner tube on the market? I thought there was, but I can't find anything on the net. My bike has a full Nexus setup in the back and it's a royal pain in the ass to remove and reinstall the wheel. Be a lot easier if there was a straight inner tube, sort of like those long balloons that they use for balloon animals.
I have access to a heat sealer. Maybe I can try to make my own by cutting a tube and sealing the ends. Or maybe just good, old fashioned patch glue to seal the ends?
They were called the Specialized Dirtworm.
I think that they are currently out of production.