I understood that I had to be careful to monitor my tire pressures as the temperature changed. Early in the winter I had initially inflated the tires to 40 PSI (I believe--perhaps it was 42) and then a few weeks ago, when the temperature outside was in the 20s, I increased that to 46 PSI. I just checked the tire pressures again, since the temperature today is 55 F. I was expecting to have to bleed some air out of the tires (a question on that follows), but was surprised to find all four tires still at exactly 46.0 PSI, precisely what I had filled them to roughly a month ago, when the temperature was quite a bit cooler. The temperature in my garage is probably cooler than 55, and may also have been warmer than in the 20s a month ago, but even so, shouldn't I have seen some increase in tire pressure due to the increased temperature? As for my question on bleeding air from the tires if I had needed to, I realized that I probably don't have a good tool to do that with. Am I right to assume that I should probably just buy an inexpensive tire pressure gauge with a bleed valve, for example, something like this? Amazon.com: Accu-Gage S60XA (5-60 PSI) Swivel Angle Chuck Dial Tire Pressure Gauge with Bleed Valve: Automotive I'm using a digital tire pressure gauge that has no bleed valve to check the pressure, and a Craftsmen cordless inflator to fill the tires, but I don't think there's a good way to bleed the tires using that either. Thanks.