Cold tire pressure

[Greg Chick]

I have three different manual tire pressure gauges. They all read very close to each other. The TPS readings on my present R1T (21” tires) consistently run 3 pounds less than the manual gauges. My prior R1T had 20” AT tires and the readings were similar. I live at 7,000 feet and garage the vehicle. I run 50 pounds measured with the manual gauge after the vehicle has set overnight. Tires seem to be wearing evenly.

My 21" tire wear is fast, but even, Im @ 5,000 Ft. and garage kept. I point out that I may start out at 35 degree F. from my garage, and travel an hour to below 1,000 Ft. as well 70 degree F. and see 5 PSI maybe 6 PSI change. This is not avoidable, and seemingly no problem. My point is elevation and ambient temps are a factor.

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