of course Bill. On Friday, August 1, 2014 9:57:22 AM UTC-5, Bill Lindsay wrote: > > Ron > > You post the right chart but are interpreting it incorrectly. At sea > level atmospheric pressure is ~15psi, and at 7000 ft it's ~11psi. His tire > pressure will increase by that same 4 psi. When you measure tire pressure > you measure the difference between the pressure inside the tire and the > difference outside the tire. A 40 psi taken into the vacuum of outer space > would then measure 55psi. 55psi absolute pressure inside the tire. > > Your potato chips bag bulges but it's still a really low pressure. > Probably less than 1psi. > > On Friday, August 1, 2014 6:27:06 AM UTC-7, Ron Mc wrote: >> >> here's the chart - Kg/cm2 is close enough to atmospheres >> https://www.avs.org/AVS/files/c7/c7edaedb-95b2-438f-adfb-36de54f87b9e.pdf >> >> On Friday, August 1, 2014 8:19:31 AM UTC-5, Deacon Patrick wrote: >>> >>> My tires are at 40psi max anyway, so I don't worry about it going from >>> 8k where I live to 13k on some passes. Based on Ron's numbers, if you keep >>> your's at 60psi usually you'd endue at 72psi, so no big deal. If you're >>> concerned about it, you've naught to lose by dropping them down. >>> >>> With abandon, >>> Patrick >>> >>
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