Tire Pressure Vs. Ambient
I recently found that adjusting our tires to the cold inflation temperature base on the local ambient may not be the correct way to do this. Based on this info, the ambient temp for setting tire pres...
Forum Discussion
I look at this chart as one more tool that is available to help make good decisions. The whole tire pressure "cold" has been a big moving target when traveling through different climes. This puts that moving target into perspective by assigning a reference attribute.
Saturday I will check tire pressure in anticipation of a Sunday departure to head North. The ambient temp will be at least 90, perhaps more once I get out to the barn. With a normal cold inflation pressure of 90 psig I expect the tire to be at 96 or so. Conventional wisdom would suggest that I drop the pressures back to 90 but that runs counter intuitive to me since I know the ambient will drop dramatically by Tuesday when I hit Elko and even more when we arrive Idaho Falls. For the time being, I'm going to adjust the pressures using this chart and than keep an eye on how it goes.
I think one of the values of this info is that it gives a guide as to what your pressures should be at different temps. If you have a good feel for that, abnormalities would become more evident. My TPMS readouts are very accurate so it's even easier to check every morning while traveling.
Of course, as stated, the tires are never run below your carrying capacity pressure regardless of temp.
Saturday I will check tire pressure in anticipation of a Sunday departure to head North. The ambient temp will be at least 90, perhaps more once I get out to the barn. With a normal cold inflation pressure of 90 psig I expect the tire to be at 96 or so. Conventional wisdom would suggest that I drop the pressures back to 90 but that runs counter intuitive to me since I know the ambient will drop dramatically by Tuesday when I hit Elko and even more when we arrive Idaho Falls. For the time being, I'm going to adjust the pressures using this chart and than keep an eye on how it goes.
I think one of the values of this info is that it gives a guide as to what your pressures should be at different temps. If you have a good feel for that, abnormalities would become more evident. My TPMS readouts are very accurate so it's even easier to check every morning while traveling.
Of course, as stated, the tires are never run below your carrying capacity pressure regardless of temp.
