May-28-2015 11:02 AM
May-30-2015 11:39 AM
May-30-2015 10:32 AM
two-niner wrote:
JetAonly is correct. Everything is based on 59 degrees F. at sea level.
May-30-2015 10:17 AM
rgatijnet1 wrote:
When I check my tires before getting on the road, I am looking for 95 psi, no matter what the outside temperature is. 95 psi is 5 psi over what the manufacturer's chart recommends as the minimum based on what my coach weight dictates.
If it is less, I add air until my tire gauge reads 95 psi and do not concern myself with the outside temperature.
May-30-2015 10:17 AM
May-30-2015 05:48 AM
May-29-2015 02:52 PM
May-29-2015 12:36 PM
Ductape wrote:Two things:
+ 1 to JumboJet answer of the year!
This discussion also cannot be complete without discussing elevation. As you rise, air pressure lessens, so correspondingly Psig in the tire increases. Meanwhile, you are further from the center of the Earth, so gravity is diminishing. Do we need a correction table for altitude? I think pilots use them.
May-29-2015 12:18 PM
May-29-2015 12:16 PM
May-29-2015 09:41 AM
rgatijnet1 wrote:Not me. This one's built into the coach. The last one I had, I finally gave away because of the problems with it. I had a problem with this one losing connectivity but they fixed it. I can always see when it's working. It's very accurate and displays both the pressure and temperature.holstein13 wrote:rgatijnet1 wrote:
In my case, since I checked my tires when cold, before I got on the road, (This may not be a convenient thing to do based upon your location or time of day.) if I noticed a tire that was LOW at the first rest stop, I would know I have a problem with that tire. (I'm not sure how you would "know" you have a problem. I think you would ASSUME you have a problem. But I certainly would not ASSUME I had a problem. Maybe some kid just let some air out.)I may put air in it to get to a service center, but I certainly would not ASSUME that the tire was now safe and would remain safe/perfect the next day.(Sounds to me like you are making other assumptions. Not me. I'll inspect the tire and keep an eye on the tire pressure monitor and I'll figure out using facts whether or not I have a problem.) If it was a dual, I would also be concerned about the other dual that had to take up the additional weight to compensate for the tire that was low.
Is this the same monitor that did not warn you the tire was losing air until you noticed it at the rest stop? :B
May-29-2015 08:59 AM
Groover wrote:pconroy328 wrote:
Never mind the fact that most of use pressure gauges with absolutely no idea of their accuracy or precision. While the physics may be sound, PV = nRT, it strikes me as needless hand-wringing and worrying.
"Gee, it's 72* outside, let me check the conversion chart... OK, now I'll pull out my $3 pressure gauge and check..."
I agree. A lot of people are overthinking this and placing too much confidence on a gauge of unknown accuracy. Just get a good gauge, check it against a few others and then check you pressure before driving. Maybe run a few PSI higher than the minimum recommended to allow for gauge error, slow leaks, load changes, etc. Check your gauge against others periodically to be sure that something hasn't happened to it.
May-29-2015 08:51 AM
May-29-2015 08:25 AM
pconroy328 wrote:
Never mind the fact that most of use pressure gauges with absolutely no idea of their accuracy or precision. While the physics may be sound, PV = nRT, it strikes me as needless hand-wringing and worrying.
"Gee, it's 72* outside, let me check the conversion chart... OK, now I'll pull out my $3 pressure gauge and check..."
May-29-2015 08:18 AM