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Old 05-31-2015, 10:08 PM   #11
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Originally Posted by mudman2 View Post
I've got a 2015 t19qbhw with 13" tires, I believe it says max pressure 65lbs. Should I be running that on the road? I checked the pressure and its reading 45 lbs now. I've made some 200 mile trips at 70-75 and it appears fine.
Thanks in advance
The problem, as I understand it is damage from sidewall flexing. This can be from heat but also excesses bending. So I am with in keeping them at 65psi.


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Old 05-31-2015, 10:37 PM   #12
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Originally Posted by Evereddie View Post
There is something wrong with that dealers statement.
X2. The WORST that could happen with max inflation is that the tires wear in the center.

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Old 06-01-2015, 08:09 AM   #13
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The sticker recommends 50 psi cold tire

Keep in mind where I bought my trailer was at the bottom of the pass. High elevation to get back home. Not the first time I heard about air and high altitude/elevation and blow outs - my spouse and rv traveling peers have too. Dealer confirmed it and said he makes recommendation but there is a fair amount of naysayers. His service center gets the repair, so I dont think he cares one way or another if people believed him or not. Atmospheric pressure and temps will definitely affect the tires in my region. I look at it much like my experience with the surge protector...some people will do it or not. I've had bags of chips pop while traveling, that tiny observation is enough for me. Haha
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Old 06-01-2015, 08:28 AM   #14
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Everything I have ever heard or read says to run trailer tires at the maximum psi. As was stated earlier, you lose weight capacity when you lower PSI. RV makers generally do not place tires on units that offer lots of capacity over the weight ratings. They tend to run them at their limits and you need full psi to get the full weight ratings.


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Old 06-01-2015, 08:36 AM   #15
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Well I think we're missing something on the point here. I completely understand the dealer's opinion of under inflating while at the bottom of the pass due to atmospheric changes. A tire at 50# at the bottom of the pass may be 60# at the top.

BUT if you're measuring your tire pressure at the top then you're at 50#, traveling down the pass may leave you at 40# at the bottom.

I think it would be better to inflate to 65# at the higher altitude and be a little under at lower altitudes, than the other way around. A lot more convenient (but not as safe) as stopping to correct air pressure after significant altitude changes.
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Old 06-01-2015, 09:18 AM   #16
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Here is an article which explains tire pressure changes due to altitude. These changes are minimal and I keep my tires at max cold pressure.
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Old 06-01-2015, 09:33 AM   #17
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Thank you all for responding. I think I'll go with 55 lbs for the moment.
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Old 06-01-2015, 06:01 PM   #18
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Sorry, but the RV dealer doesn't know what he's talking about. At best he's got some anecdotes and is incorrectly drawing cause-and-effect conclusions. The science is as noted in the Tire Rack piece.

The simple truth is tires are at the their maximum load-bearing rating when inflated to the maximum pressure measured "cold". Running lower pressure decreases load carrying capability and increases heat buildup. It also causes increased rolling resistance and thus negatively affects fuel mileage, albeit not likely to a material degree. Lastly, resistance to puncture is largely a matter of friction, so highly inflated tires will be at least somewhat more resistant to puncture failure.

I run mine at the maximum and agree that the worst downside is higher treadwear in the middle. Since most of us must replace trailer tires due to age/dry rot long before tread wear becomes an issue, this means little to me.


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Old 06-02-2015, 11:22 AM   #19
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I live at 7600ft. I have always worried about my tires being under-inflated when driving to Nebraska or Texas. Now I see the temperature increase will partially offset the internal pressure decrease. And when going to a much lower altitude, I will over-inflate 2-3 lbs before starting on the trip (both tow vehicle and camper).

I took the need to blow out my sprinkler lines in the fall as my man-card excuse to buy a man-size air compressor for the garage. This also gives me an air supply for checking my tires on a regular basis, as well as an air source for hobby air brushing.

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Old 06-02-2015, 12:50 PM   #20
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Originally Posted by handbuilder View Post
The sticker recommends 50 psi cold tire
If that is how the original tires on your camper are rated, certainly stay with that as the max rated pressure as long as you have those tires.


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