After reading the replies and some other online information I am getting a little more confused. So far dry air is suppose to be as good as nitrogen, you can use air in nitrogen and neither cause problems. One thing not brought up is a recent article I read is you should not put nitrogen in an older tire. The article did not indicate what an older tire was or the problems that might result. From my experience working in auto shops that did both mechanical work and painting I know one thing is a regular compressor does not dry out the air. It may take some dampness out but on a high humidity day you can see vapor coming out of the air hose if you are using air tools. The paint shop used an air dryer and had less of a problem. I do not know if the new compressors have air dryers on them or not but when I worked with them they did not. Since I have a few years on me it was a couple of decades ago. I did read one article that by what was said came from a trucking company. It stated that they averaged 2 million miles a month and with air had 35 tire problems but when they went to nitrogen it went to 5 of which 3 were road hazard problems. I guess my question is will nitrogen stop tires from having problems and is it worth it cost wise? The other would be are the majority of tire problems caused by road hazards vs air/nitrogen? From experience with only air in tires I know the material the rim is made of also makes a difference in the regions where the temp goes between 90 to -20 degrees. Will the rim material make a difference with nitrogen under the same temp?