That's nasty! Guessing the tire must have spun on the rim a bit to slice it up like that.This is a good view of how thick they are. This one experienced a 2" nail penetration and looked like this when I took it out of the tire along the side of the road. I really have no idea how it got this shredded. I did ride about half a mile on the flat so that probably had something to do with it.
I'll be damned I didn't know that. Thanks for the info, justjeff. I got tired of messing around with the big, thick tubes and went back to regular ones. I don't know if the ones I'm using now are synthetic or natural rubber. I can't even remember what brand they are.That is a classic case of synthetic rubber failing from a puncture planalp. A nail hole in synthetic rubber can run like a crack in a windshield. Natural rubber tubes don't have this tendency. Synthetic rubber tubes are difficult to patch as well. Look for natural rubber tubes if these issues are of concern to you. Motoz sells a natural rubber tube with 4mm thickness if you are interested.