Originally Posted by
dddd
Don't use Presta-stem tubes!
The skinny stem either leaves a gap where smog-laded air might cause localized tube failure within as few as six months
I evaluate your claim to be hooey.
I ran Presta stems in Schrader holes on my commute bike for years in all kinds of weather without a flat. I had bought some new tires that were too wide for the Schrader valve tubes that came on the bike, so I put in some properly-sized Presta valve tubes that I had in my pile. There was simply no reason to swap them out once I had them in there.