@redrhodie, I just think I figured out what you meant. When you said the CO2 would "leak out rather quickly" I wasn't sure what you meant. I waited 2 days after I changed the tube to ride again and I noticed that my front tire only had maybe 60 psi in it (dropped 30 psi from 2 days prior) and that my back tire only was down maybe 2-4 psi in the same time period. NOW I finally understand what you meant! I wonder why that is???