At 06:53 PM 10/19/2015, Angus Gordon wrote:
>Thanks David, I've been using a rule of thumb of 1% per 5F for a
>long time but I don't know where it came from. Michelin perhaps.
>Normally I only use it to overinflate when headed to a cold
>destination. Kept me out of the weeds so far...

That's likely more accurate.  It's certainly accurate to whatever
degree over a wider temperature range, as it understands about it
being proportional.  I believe the Ideal Gas Law says for equal
volume, pressure change of 1/273 per degree C (or for equal pressure,
volume change of 1/273 per degree C).    Real gases get sulky and
turn liquid at some point...

Yrs,
d