So my Carlisle Radial RH's that I bought a year and a half ago have been to a few places.
from Orlando FL to LA Calif, 2502 miles and sat then for 4 months
from LA Calif to Orlando FL, 2502 miles and sat for 1 month
from Orlando FL to Lewistown PA, 1021 miles and sat for 4 months
from Lewistown PA. to Columbus OH (and back), 706 miles and then sat for 4 more months
from Lewistown PA. to Orlando FL, 1021 miles and sat for 6 months
from Orlando FL to Chicago IL, 1062 miles and sitting.
around 8800 miles in total.
I added the sit time between runs as it's more of a factor than some would think. The tires have to heat up and be driving to get the UV inhibitors (among other stuff) to migrate to the sidewall surface of the tire. When they sit around the stuff dissipates and the tires begin to rot from the sunlight.
I always cover them if I am going to be somewhere longer than a couple days. To date they have no indications of cracking on the sidewall or tread separation or blemishes or even loss of air. All 4 tires have had 80 psi in them each time I have checked them (a year and a half!), kind of dumbfounding a bit to me as I have never seen tires do that before.
I do one other thing as I believe it helps. when I start driving in the morning I go at least 5 miles under 50 and then hit 55 for a few more, then 60 for a few more and then 63 - 64 for the rest of the day. (I do hit 70 on occasion when passing a semi or something) I think taking a cold ST from sitting to full operating temp in just a mile or so adds to the failures. Kind of a thermal shock failure.
