Originally Posted by unterhausen

If the tube is under the bead just right, it can go for quite a while before it pops, at least with butyl tubes. I speak from the sad experience of this happening on the first day of a 1200k, which resulted in me getting way behind. I had changed tires so I would be less likely to get a flat. I am not sure I believe latex are any more prone to this than butyl.
There is no doubt that latex tubes will extrude into some pretty tight spaces. I have never used them in clinchers though. At least there should be some contrast with the tire, a bubble of butyl tube under the bead can be really difficult to see sometimes.

Even though they are very expensive, the urethane tubes looked attractive to me. Then I found out they have a lot of problems, heat for one.