What about water getting in the tires and the foams soaking it up?
Searching google seems it's about a 50-50 split on people who run with or without the foams.
Did you notice after installing the foams and glueing the tires did they not fill with air after you compress them. I tried my best but there was no way I glued the tires 100% which left enough air back in so I never needed the holes.
I've seen some guys put small holes in the rim.What is the advantage/disadvantage of doing this?