Quote:
Originally Posted by hummingbird
basjoos, how long does the drift-down take? (my guess is anything upto 3 months...) What is the mechanism? Valve-stem leak?
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I got the tires in the summer before last and it initially it took about about 4 months for the pressure to drift down as the oxygen constituent of the compressed air in the tire reacted with the rubber interior and the temps dropped as we went from summer into winter. Then as we went from winter to summer, the pressure pretty much held constant as the temps rose and I had to do another add in late summer. I last topped them off in Jan and haven't had to make any more adds since (other than the one that developed a leak from a nail and had to be patched. The tires are now 1-3/4 years old.