Originally Posted by
cyccommute
You are more likely to pinch a tube that is partial inflated because you are more likely to have to use tools to install the tire. I don’t pinch tubes and I never inflate tubes. I assure you that I know what I am doing.
The problem is that the TPU tube likes to cling to the inner wall of the tire. So when you get to the last part, you will find that the TPU tube is just under the tire bead. Prying the tire bead at this point would pinch the tube. That is why you need to inflate the TPU tube to get it to stay in the main body of the tire and away from the bead area.