May Fortune continue to smile on you, my friend.

Now that I have had time to circle back to the Forums it occurs to me that I failed to make my cotton ball suggestion.   Have Jacinto take a cotton ball and wipe it around the inside of the suspect tire.  If there is anything protruding into the tire the cotton will snag on it and leave a wisp of strands that show where it is.

Ray-

If you followed my "Rejuvenation" journal (or read the later posts in this thread) you are already aware of the sad saga of my tires.

I can't find a source for folding 20-inch Marathons (or any other brand/model, for that matter).  Where do you get yours?

For the weeks that I toted a spare I simply bungeed it to the tops of my rear panniers, draped over my tent.  It was inconvenient but way better than not having it at all, as matters proved. 

Keith,

Utah Trikes is a good source for Schwalbe Tires. At the height of COVID, I was was searching high and low for 26" Marathon Racers. Utah Trikes was the only place that had them in stock. 20" folding tires here.

Thanks Kelly!

Kelly, all the 20 inch Schwalbe Marathon tires on that web page are wire bead. I have never seen a folding Marathon advertised in 20 or 26 inch size.

My Schwalbe Marathon Racers are wire bead. My 28mm Schwalbe Durano tires are folding, but I wouldn't use them for a cross country tour.

folding bead Kojak. It's a 1.35, perhaps a bit narrow for touring. But, it's a folder.

For those who might find this good information - there is recent discussion on Bent Riders OnLine (BROL), about 406 size tires. To my memory, Several have spoken in favor of the Continental Contact Urban(the Speed isn't as well liked). Specifically, they like the flat proof-ness, and that it is good on wet roads. One person said they couldn't find the tire state side, but ordered from Bike 24 (somewhere in Europe), and got three tires shipped for $80. seems like a good price. 

Yes, I always carry a spare tire even though I use Marathon Supremes and Pluses. Murphys law can/will happen at the worst time. I keep it folded down about the size of a bar of soap. 

Hi Keith - it figures if you DON'T carry one, you'll need one.  I was biking in Scotland a few years ago.  Brought my Bike Friday.  Didn't bring a spare.  A day or so into biking, the tire bulged and needed to be replaced.  I WALKED to about 4 or 5 bike stores in Edinburgh and finally found a shop that had a pair that would fit!  Thank God!!!  The 20-inch tires are hard to find!  Similar thing happened when I was in Chicago!  Very difficult if not impossible to find a replacement. :(  Having one on hand doesn't take much room or weight - so it's worth it.