Pulled it out of a used tire Norco\Kenda tube. Thickest, heaviest tube I've ever seen.
I bet it's very hard to puncture.
It's 1.5-1.75...can I over inflate it? I have 1.95 and 2.10's.
I was thinking it would be a great tube for rides where you really don't want to patch flats...
Like in the Everglades, a gator might get ya when you put the tube in the water looking for bubbles.