Jim,
Thanks for this. I was wondering about how best to monitor tire pressure when I was out for a spin last night. I was caught on my M109 with a flat tire on a freeway a few years ago, didn't like that one bit. Would have appreciated an early warning that I had caught a nail & was loosing pressure as a result, rather than learn at 110 km/hr that I was finally running on the rim and sliding with he camber int he road to the edge of the highway.
C