Re: You with tire monitors - how high is too high?
With my TyreDog unit, I observed how high the pressure got on a warm day, and then set the upper limit to just about it. There are many factors that affect tire pressure - heat, altitude. I found this info: for every 1000 feet gained in altitude tire pressure goes up 1/2 lb. So if you ride up 10,000 feet and it gets 50 degrees warmer since you last checked it that's 10 psi more pressure.
I use the TyreDog monitor to make sure the tires don't get too low in pressure.
Jim G - Rochester, MN
BMW MOA #123976