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Old 03-09-2021, 11:44 PM   #1
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Tire pressure

Tire question: when I leave Ohio all tires are set at 95psi. Half way to Florida I’m up to 118 psi and up. Once in Florida for a week the tire are still the same. When coming back home do I leave them or let air out to 95psi. Thanks

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Old 03-09-2021, 11:52 PM   #2
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Check and set tire pressure when the tires are cold regardless of your location. Tire pressure increases as the temp increases and the tires heat up.
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Old 03-10-2021, 12:29 AM   #3
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What he said. Check your pressures in the morning before you start your days travel. Don't worry so much about what they get up to by the end of the day.
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Old 03-10-2021, 12:40 AM   #4
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Good advise from the EA37 and the Lt.
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Old 03-10-2021, 02:28 AM   #5
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Originally Posted by EA37TS View Post
Check and set tire pressure when the tires are cold regardless of your location. Tire pressure increases as the temp increases and the tires heat up.
Does it matter if you set it in the morning when it is 30 degrees outside (and tires are cold from no movement) versus when it is 60 degrees outside (and tires are cold from no movement)
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Old 03-10-2021, 02:39 AM   #6
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Does it matter if you set it in the morning when it is 30 degrees outside (and tires are cold from no movement) versus when it is 60 degrees outside (and tires are cold from no movement)
Yes it does matter. Check them in the morning before the days travel begins.

Ever had low pressure alarms in a car when the temp outside dropped overnight? Common occurrence in my area during the winter with the first cold snap.
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Old 03-10-2021, 02:57 AM   #7
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Yes it does matter. Check them in the morning before the days travel begins.

Ever had low pressure alarms in a car when the temp outside dropped overnight? Common occurrence in my area during the winter with the first cold snap.

I guess I should have explained where I was going or asked my question better.

I normally have all six tires set at 82, because that is what is in the RV.

But I heard or learned that 85 on front and 80 on the rears would make my F-53 ride smoother.

When I wanted to make the pressure adjustments it was 70 degrees outside but the tires were cold as they had not moved all day.

Since outside temperature was not cold (like early morning) I just made some assumptions

I put set the fronts at 87 psi and the rears at 83 psi My thinking is that when outside temperature dropped the fronts would be at 85 and the rears would be at 80?

Does that make sense?
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Old 03-10-2021, 03:09 AM   #8
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I guess I should have explained where I was going or asked my question better.

I normally have all six tires set at 82, because that is what is in the RV.

But I heard or learned that 85 on front and 80 on the rears would make my F-53 ride smoother.

When I wanted to make the pressure adjustments it was 70 degrees outside but the tires were cold as they had not moved all day.

Since outside temperature was not cold (like early morning) I just made some assumptions

I put set the fronts at 87 psi and the rears at 83 psi My thinking is that when outside temperature dropped the fronts would be at 85 and the rears would be at 80?

Does that make sense?
Yes, that makes sense. I am not sure about the exact numbers, but pressures will decrease as outside temps drop.

II actually establish a range based on MH recommendation and tire manufacturer's weight to pressure tables. My current rig says 110 and the Michelin recommends 90 based on weight. My range is 90 - 100 PSI. At an outdoor temp of 60 degrees I can set my tires to 95 PSI and be good from 30 degrees to 100 degrees outside temp.
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Old 03-10-2021, 03:15 AM   #9
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You need individual weights or at a minimum axle weights

If a tire set at 95 psig gets up to 118 psig quickly you might be loaded close to your tire load chart

However you noted they stay at 118 cold in the shade?

Per the other comments set them cold, per your load chart and I like a minimum of 10 psig over but many go 5 psig above

I don't ever run extremely hot tires on anything and I would watch your tire temperature if traveling on 100 degree days
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Old 03-12-2021, 05:06 PM   #10
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Tire Pressure

I am going to buy tire pressure monitor system and the crossfire setup and need to know the exact tire pressure to set my tires at. When I ask Thor they tell me to always run what is listed inside the RV on the sticker. I am concerned about running a tire pressure too high because it might ride harder when driving. Am I over thinking this? K.
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Old 03-12-2021, 06:30 PM   #11
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Tire pressure

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Originally Posted by K. Meckes View Post
I am going to buy tire pressure monitor system and the crossfire setup and need to know the exact tire pressure to set my tires at. When I ask Thor they tell me to always run what is listed inside the RV on the sticker. I am concerned about running a tire pressure too high because it might ride harder when driving. Am I over thinking this? K.


Maybe... but it’s not really complicated. Get your unit weighed either on each corner or each axle. Then go online and get the tire pressure table for your specific tire model and size and do what it tells you. Perhaps run a few pounds over if you feel the need for a safety margin. You probably will notice that the pressure recommendation on your Thor yellow sticker will closely match the table’s number for your coach when it is at the maximum GVWR. My yellow sticker calls for 92psi front and rear. The table wants me at about 85 based on my actual weight. I set my cold pressures at 89-90. My table looks like this. Yours may be different.
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Old 03-12-2021, 08:06 PM   #12
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Originally Posted by K. Meckes View Post
I am going to buy tire pressure monitor system and the crossfire setup and need to know the exact tire pressure to set my tires at. When I ask Thor they tell me to always run what is listed inside the RV on the sticker. I am concerned about running a tire pressure too high because it might ride harder when driving. Am I over thinking this? K.
Weight your coach and then set the pressure to the tire manufacture’s weight to pressure tables.
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Old 03-12-2021, 08:13 PM   #13
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I never set my tire pressures above the chart for my size tires. The tire companies have done more research than any of us and have determined what the safe pressures are for associated weights. The have tested for life of tire carcass, tread wear and weight carrying capability. The chart reflects the happy medium for all those factors. Increasing pressure will surely compromise one aspect of their testing. Do you want to take the chance on which one will fail for you?
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Old 03-13-2021, 03:23 AM   #14
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Interesting how we in the RV world discuss tire psig

We ran all kinds of rigs and associated tires, most 14 ply or heavier same as a large Class A

On the F550 pickups 14 ply or higher as well

Never did lower a tire pressure because we had 75% load or didn't have a back haul

Hauling cattle we typically ran empty 60% of the time

Does anyone really think truckers adjust their tires each trip based on % load, empty or loaded to the max?

Typically you set the tires psig based on the load, axle rating, tire rating and use

Normally that was close to or at cold sidewall maximum psig

Why, because the tires failed if they were under inflated and over heated

You don't want a load with a high center of gravity on a squishy tire

Most blown tires are fron road Hazzard or under inflation and over heat

My Tuscany placard states 120 psig howver my weight and tire chart shows 100 psig

The coach handles well at 100-120 but doesn't swerve/move noticeable when running 110 or higher

I run 120 in the front and 110 on the drive and tag

Drives great, tires stay cool in summer, wearing very well

Do what works you and watch your tire Temps and how it handles
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Old 03-14-2021, 02:43 AM   #15
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I never set my tire pressures above the chart for my size tires. The tire companies have done more research than any of us and have determined what the safe pressures are for associated weights. The have tested for life of tire carcass, tread wear and weight carrying capability. The chart reflects the happy medium for all those factors. Increasing pressure will surely compromise one aspect of their testing. Do you want to take the chance on which one will fail for you?
If I ever get back home safely, I am going back to the Yellow sticker 82 psi for all 6 tires.

Before this trip I went to 85 psi front and 80 psi on the rear. My ride is no smoother and may be worse? I follow why it make seem on paper to have less air in the rears but I can't feel the difference. My return trip will be lighter so I will give it one more chance before giving up.
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Old 03-14-2021, 05:47 PM   #16
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If I ever get back home safely, I am going back to the Yellow sticker 82 psi for all 6 tires.



Before this trip I went to 85 psi front and 80 psi on the rear. My ride is no smoother and may be worse? I follow why it make seem on paper to have less air in the rears but I can't feel the difference. My return trip will be lighter so I will give it one more chance before giving up.


If your sticker says 82 but your weight chart put you at 85 you might be overloaded. Could explain why you seem displeased by the handling.
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Old 03-14-2021, 05:58 PM   #17
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If your sticker says 82 but your weight chart put you at 85 you might be overloaded. Could explain why you seem displeased by the handling.
I concede I have not weighed my RV nor have I referred to a weigh chart, so I may not ever get the most optimum results.

What I did was go by another thread where it was recommended for similar F-53 as mine where they had 85 in front and 80 on back.

To be honest and I hope I am not braking some RV Man Law, I don't believe weight will ever deviate much on my RV, we may have been a tad heavier than normal on this trip as we brought a few things for our son.

But I don't want to have to check my weight each time to set my tire pressures

With that said, I will drive back with same tire pressures and we will be lighter for sure. I may have an epiphany coming
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Old 03-14-2021, 06:40 PM   #18
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I concede I have not weighed my RV nor have I referred to a weigh chart, so I may not ever get the most optimum results.



What I did was go by another thread where it was recommended for similar F-53 as mine where they had 85 in front and 80 on back.



To be honest and I hope I am not braking some RV Man Law, I don't believe weight will ever deviate much on my RV, we may have been a tad heavier than normal on this trip as we brought a few things for our son.



But I don't want to have to check my weight each time to set my tire pressures



With that said, I will drive back with same tire pressures and we will be lighter for sure. I may have an epiphany coming


Well, I’d recommend getting it weighed at least once just so you’ll know. For most of us the weight doesn’t change much over time but the baseline is pretty interesting. In my case I’m well balanced front to rear and about 500 - 600 lbs under GVWR at each end. My tables want me to be under the yellow sticker number by nearly 10%.
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Old 03-14-2021, 08:08 PM   #19
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This is not complicated!
The rv or tire manufacturer have provided the optimum tire pressures for your rv posted in the RV or on the tire sidewall.
Inflate cold, meaning 1st thing in morning before traveling regardless of outdoor temp, to one of those pressures & DONE. When you start deflating due scaled weights you will also see tire temps rising & possibly squirrelly handling due to being under inflated.
Getting the rv weighed is a good idea so you know for sure, but for me it wouldn't affect tire pressures, they'd be at either the rv or tire recommended pressure for optimum tire wear, cooling & handling.
As far as ride, your rv is on at minimum a 1 ton truck chassis so don't expect a Cadillac ride.
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Old 03-14-2021, 08:23 PM   #20
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This is not complicated!
The rv or tire manufacturer have provided the optimum tire pressures for your rv posted in the RV or on the tire sidewall.
Inflate cold, meaning 1st thing in morning before traveling regardless of outdoor temp, to one of those pressures & DONE. When you start deflating due scaled weights you will also see tire temps rising & possibly squirrelly handling due to being under inflated.
Getting the rv weighed is a good idea so you know for sure, but for me it wouldn't affect tire pressures, they'd be at either the rv or tire recommended pressure for optimum tire wear, cooling & handling.
As far as ride, your rv is on at minimum a 1 ton truck chassis so don't expect a Cadillac ride.


So why do you think the tire manufacturers provide a table for recommended pressure based on actual weight? The number on the tire sidewall is always the maximum permissible pressure for the tire. Not a recommended pressure.
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