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Old 08-12-2016, 11:10 AM   #31
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My opinion is you should be fine.....I'M M in the middle of a tire tesr, testing both D and E rated tires at the same time, and different brands....have approx 4000 miles on this, running 65 lbs cold....

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Interesting...I can't wait to see your results. Do you have any preliminary results with 4K miles on them?
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Old 08-12-2016, 12:56 PM   #32
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Good so far....from Nebraska to N. Carolina and back to here

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Old 08-12-2016, 05:20 PM   #33
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Sorry to jump in towards the end of this thread. I can start a new post if the moderators think so.

My tire pressure question is a little different. I've always believed that side-wall stress and tire wear were the two things you should be concerned with. The former is the culprit for blowouts. I've taken my 2016 Rockwood 5th wheel to a CAT scale near my home and have numbers for all of the axle, total, hitch, etc weights necessary to understand my rig. I live in Idaho and we can get temperature swings of 40 - 50 degrees between early morning hours to highs in the afternoon. It wouldn't be unusual to have cold temperature pressures to change drastically throughout the day. Not to mention the pressure differences due to altitude changes. I can leave my house at 4740' MSL altitude and 45 degrees F) and end up at a campground later in the day at 7100' MSL altitude and 90 degrees F. If conditions like that make a 3 - 5 psi difference in your tires (cold temp measurements), do I need to be worried about blowouts or just tire wear changes. I'm not sure how much pressure change from the max or recommended will adversely affect your tires?

Am I on ok here or do I need to watch the tire pressure more carefully?

Tire pressure changes by 2% for each change of 10F in Ambient. Altitude does affect inflation but not a lot.
Here are some posts that I think will answer your questions.

"Blowouts" do not occur due to normal pressure changes but they do occur form running low on inflation.
Get a TPMS. Learn how to set and use it and you can figure you just eliminated 40 to 60% of the reasons for a tire failure.
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Old 08-13-2016, 12:01 AM   #34
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Originally Posted by Tireman9 View Post
Tire pressure changes by 2% for each change of 10F in Ambient. Altitude does affect inflation but not a lot.
Here are some posts that I think will answer your questions.

"Blowouts" do not occur due to normal pressure changes but they do occur form running low on inflation.
Get a TPMS. Learn how to set and use it and you can figure you just eliminated 40 to 60% of the reasons for a tire failure.
Thanks to all on this topic.

Tireman9,
Those are good numbers to know. Thanks!
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Old 08-16-2016, 02:45 PM   #35
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Originally Posted by bob caldwell View Post
My opinion is you should be fine.....I'M M in the middle of a tire tesr, testing both D and E rated tires at the same time, and different brands....have approx 4000 miles on this, running 65 lbs cold....

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Interesting. If you are running same inflation on LR-D and LR-E what are you expecting to see?

What % of actual measured load is each tire rated for at 65psi?

So if you see some difference how will you know if it is because of brand, Load Range or actual tire load by position?

Is tour TPMS giving any indication of difference?
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Old 08-17-2016, 10:03 AM   #36
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Don't have a TPMS yet, but mostly brand against brand..,..I'm under max weight, and on last trip to NYC rally, had 2 tire failers,, do to age....approx 5years......one tire went bad just leaving Nebraska, and tire place only had 2 tires E rated...no other C or D's. Then leaving Missouri, next one went....found a Walmart bout a mile away, same result...had 2 tires, D rated....no chose then..,was running 80 in originals, but beat the trailer to death, so went back to 65 on these....with Arizona trip coming up, and the TV show, TPMS is in the future...
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