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Old 02-01-2016, 05:30 PM   #1
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PSI

I am pulling a 24ft TT and the PSI on the tire says 50PSI is that a good PSI or should it adjusted. TT weight is 4800 dry. The reason I am asking is I have read across different forums that the PSI on the side of tires is not always the correct pressure.
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Old 02-01-2016, 05:42 PM   #2
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Not knowing what size tires or how much your loaded trailer weighs, going with the max pressure as stated on the sidewalls seems like the way to go. Keep in mind that many trailer tires have a 65mph max speed rating.
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Old 02-01-2016, 05:57 PM   #3
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My 205/75R14 load range C tires have a maximum pressure of 50 psi on the side of the tire. Just before I hit the road I always air to 50 psi cold. Of course the pressure goes up on a hot day on the highway. I don't check the pressure again until I'm ready to leave. The tires on my trailer are not overloaded. No problem with tires in 6700 miles.
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Old 02-01-2016, 06:14 PM   #4
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Normally TT tires are to be run at the max on the sidewall, it's the much bigger MH tires that can be adjusted to the weight of the rig.
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Old 02-01-2016, 07:10 PM   #5
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Run max sidewall psi. That will give your tire the best possible chance to perform. Low psi builds heat and heat kills tires.
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Old 02-01-2016, 07:33 PM   #6
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You might review this information http://rvsafety.com/weighing/tire-inflation-tables


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Old 02-09-2016, 11:20 PM   #7
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Just what would raising the tire pressure do, so long as you do not exceed the maximum tire pressure rating. Beside a rough ride and perhaps uneven tire wear, you are better off then being under inflated.

My PUP tire sticker says 35 lbs. My TT sticker says 50 lbs. That is what the manufactures design around. Why would you not inflate your tires to what the manufacture says?

If you find that the you prefer a stiffer ride, fine it is your TT.

My F-150 drives around town very nicely at 32 psi. Towing I find the "P" tire a bit squishy, so I run 40 psi. The max cold pressure is 44 psi.

I decided to try "D" range tires at 65 psi on my TT to see if they were any improvement over the seven year old "C" range tires that came with the TT . We have a trip to AZ scheduled shortly so we will see how it goes.
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Old 02-10-2016, 07:05 AM   #8
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I run max pressure at 50psi and air up before each trip.
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Old 02-10-2016, 08:52 AM   #9
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Tire manufacturers recommend running at max pressure. Tires run coolest when at max pressure because the sidewalls flex the least.

There are exceptions to this. IIRC Goodyear recommends ~10psi OVER the maximum pressure on trailer tires if you're going to run a 65mph rated tire at higher speeds. There's more to it that just that, so please find all the information if you're going to exceed your tires speed rating.
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Old 02-10-2016, 04:55 PM   #10
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Quote:
Originally Posted by cwsqbm View Post
Tire manufacturers recommend running at max pressure. Tires run coolest when at max pressure because the sidewalls flex the least.

There are exceptions to this. IIRC Goodyear recommends ~10psi OVER the maximum pressure on trailer tires if you're going to run a 65mph rated tire at higher speeds. There's more to it that just that, so please find all the information if you're going to exceed your tires speed rating.

I beg to differ with your statement. There are numerous Goodyear documents online that indicate the proper pressure is based on the weight being carried and their published inflation tables. This is also true for most major manufactures.

While true, many supposed "tire experts" recommend maximum pressure, they also indicate if you do not know the weight numbers.

I offer the argument that if the correct tire pressure marked on the tire, it would be labeled "recommended" not "maximum"


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Old 02-10-2016, 11:30 PM   #11
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Again, we know the problem with under inflation but besides a rough ride and wearing the center tread, what is the disadvantage of over inflation.

I suppose there could be some traction loss. Still, proper "feel" is an individual assessment.
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Old 02-11-2016, 07:30 AM   #12
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Pressure markings on the sidewall only indicate the pressure at where the tire is rated. If the 'C' rated tire is rated at 1800# capacity, that pressure is where you need to inflate it to for that load. Less pressure, less load capacity. Also, a few more pounds, i.e. 5-10 may increase that capacity at a particular speed but that for sure is not a guarantee. Most domestic manufacturer's have a capacity chart on line for load per inflation pressure.
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Old 02-11-2016, 09:43 AM   #13
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As we travel, I don't believe the load bearing on each tire stays the same. I air my trailer tires to carry their maximum capacity.

Of the seven trailers I've owned, I haven't used a spare on any of them. ymmv......
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Old 02-11-2016, 11:15 AM   #14
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The tire pressure debate goes on forever. Many times this has been debated, stated, argued, or whatever you want to call it.

I'm only saying, that if you do your research, their are many documented reason/procedure for determining the correct pressure. Not what others have done or said. I'd sooner believe what the manufactures have stated.

But to each his own.


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