Originally Posted by
greenstork
To clarify, I have working tubes, there's no puncture or anything. All tires gradually lose air and fall back to a comfortable range. For example, I inflate my Conti Grand Prix's to 100-110 psi, but they're back to 85-90 in no time but it takes them a good couple of weeks to go down from there.
Again, it's not the tire that looses pressure. It's the tube.