I’m giving up on the 29er tube idea for a Coker tire.
I had to replace my 29er Coker tube due to a puncture (due to a thorn) and since then I have had nothing but problems with the 29er tubes. I had 3 Schwalbe 29er tubes on hand after that flat. I now have zero 29er tubes. I’m out of 29er tubes and all of them have failed. I’m back on a standard Coker tube now.
One of my 29er tubes failed when I inflated it to stretch it out. It quickly developed a hernia and exploded within a few minutes. The next tube seems to have gotten pinched during the install, but I was extremely careful during the install so I don’t know what’s up with that. The next tube worked for a couple weeks or so, but began losing air. I removed the tube and found no obvious holes. I dunked the tube in water and found a spot where the rubber was very thin and the air was escaping. Not a hole, but the tube wasn’t holding air. Maybe that was due to the tube getting pinched during install, or maybe it was due to a defect in the tube at manufacture. Anyways, that drained my supply of 29er tubes so I’m back on a Coker tube. I actually have three Coker tubes on hand so I’m all good.
I don’t think I’m going to go for the 29er tube idea again. If I try anything new it will be a Stan’s tubeless setup.