Thanks for your responses guys. As for the gauge, I think it's a cheapo. I've got another more solid one that I think I'll try tonight. I don't think I have a full size spare. Well, it's not a tire like the Conti's. But, it's not a doughnut either. Could there be a TPMS sensor in there too? I'll check that one too. BTW, what do you think of those digital pressure gauges?