[QUOTE=Interesting choice for a tire on the BOB trailer. I can't imagine tread would help any there. I suspect it wore out somewhere where the only tire he could find that size was for a kids bike and made do. I hadn't really considered worrying about that tire wearing out on tour before, but I suppose under loads like that it is susceptible to wear...

Is that a big mud flap sticking out above the trailers tire?
[/QUOTE]

Yeah guessing that's what happened with that trailer tire. He bought that trailer after his first failed halfway to Pennsylvania on a round trip from San Diego. So I would guess that first tire wore out some time during his 4500 miles of touring. No its not a mud flap its the neck of his guitar in a soft case strapped to the top of his dry bag.