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 > Maintaining tirepressure.

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two travelers

Smithtown, NY

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Posted: 09/23/18 03:04pm Link  |  Quote  |  Print  |  Notify Moderator

We recently took an extended trip to Glacier NP in Montana from the east coast. Before leaving, I over filled the tires to 88 (recommended 82) figuring it would get colder (37deg) and there was an increase in altitude (5,600ft). Sure enough by time we got to Glacier, pressure was down to 81. Again over filled to allow for temp changes. Pressure fluctuated, mostly higher, as temp went up and lower altiude. As we got further east looked like cooler temps. Over fill resulted in harsher ride, but could not see adding or letting air out every day. Is there a happy medium to this problem?

donn0128

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Posted: 09/23/18 03:17pm Link  |  Quote  |  Print  |  Notify Moderator

Never ever over fill tires. Fill to the recomended pressure on the drivers door post. On trailers air the tires to max as listed on the tire side wall. You can check them each morning if your worried. But honestly if your loosing air pressure there is something wrong. Otherwise checking weekly or even monthly should be more than sufficient.





Wire Man

Wadsworth, Ohio

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Posted: 09/23/18 03:43pm Link  |  Quote  |  Print  |  Notify Moderator

I always fill mine to the “max pressure” that is listed on the Tire itself because we tow a trailer. Biggest reason for tire failure is over heating which is compounded by under inflation.


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wa8yxm

Wherever I happen to park

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Posted: 09/23/18 04:57pm Link  |  Quote  |  Print  |  Notify Moderator

I fill per scaler weight. But "Cold" is 70 dergrees for practical purpsoes. (If you ask them the tire maker can tell you more precisely) no need to over fill due to 20 degrees out.

On my class A I can tell you filling the back tires just got 1000 percent easier.> DUALLY VALVES. .YES. DUALLY VALVES.. No more removing the simulator and reaching into where I can't see to do the job


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dougrainer

Carrolton, Texas

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Posted: 09/23/18 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

Cars/Motorhomes/AND Trailers all have a VIN type sticker showing the CORRECT pressure for that vehicle as equipped from the factory. USE those figures UNLESS you have a 4 corner weight done by the A Weight We Go, people at rallies. Doug

PS, do some of you MAX out your pressure on your Automobiles???? Regardless of what the Manual states???

wildtoad

Blythewood, SC

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Posted: 09/23/18 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

Here we go again... For a motorhome, in 99.9% of the situations the pressure indicated on the tires is nice to know, but NOT relevant since you may never need that much pressure to support the actual weight of your motorhome. Trailer and fifth wheels are different.

If you have no additional information, then use the pressure that is on the placard inside your motorhome.

If you only know your GAWR’s then use that along with the tire manufacturer’s weight tables if you find the placard weight too harsh.

If you know your actual axle weights, or better yet four corner weights, then use that information along with tire manufacturers weight tables to set your tire pressures for where you are at the moment.

The pressures in the charts assume some fluctuations due to temperature and altitude for short term. Adjusting pressures frequently/daily is a sign you have OCD and you need to see a doctor.


Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004

Lwiddis

Near USFS Glass Creek CG, Inyo County, CA

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Posted: 09/23/18 06:58pm Link  |  Quote  |  Print  |  Notify Moderator

If wildtoad is saying “follow manufacturer’s specifications,” X2. Go figure! lol


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DSDP Don

Moorpark, Ca

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Posted: 09/23/18 10:34pm Link  |  Quote  |  Print  |  Notify Moderator

I run my tires at a pressure that is recommended by the tire chart, according to my axle weights. Once I determined that weight, I wrote it down on my compressor. I check my tire pressure twice a year, once during my yearly service and once in between servicing the coach. In 15 years of owning a DP, the tire pressure has only been off by 1-3 psi after six months and most of that may have just been a difference I outside temperature.

For the first 13 years, I didn't use a TPMS system. I now use one, but it's only to see if I had a tire lose pressure overnight.

I'm amazed at how many people SAY they check their pressure everyday. It's surprising they don't create more issues than they avoid.


Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2016 GMC Canyon 4WD Crew Cab


DrewE

Vermont

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Posted: 09/23/18 11:23pm Link  |  Quote  |  Print  |  Notify Moderator

DSDP Don wrote:


I'm amazed at how many people SAY they check their pressure everyday. It's surprising they don't create more issues than they avoid.


[emoticon] [emoticon] How would checking the tire pressure each day create issues? Or even saying one does, whether one actually does or does not check it? I don't think I've ever seen or heard of a tire that was damaged by having a pressure gauge applied to it; the only possible scenario I can think of where that might be problematic is if the tire valve were to wear out from extra use cycles, and that just doesn't seem to happen much (and I, at least, have a couple of valve cores and a valve tool in the motorhome).

I do check my tire pressures every travel day before setting out. It's infrequent that I need to adjust anything, but occasionally it is called for.





NMDriver2

New Mexico

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Posted: 09/24/18 06:45am Link  |  Quote  |  Print  |  Notify Moderator

I have 6 motorized vehicles and 4 trailers. I live at 4200 ft and drive to 6200ft regularly. Years ago I figured out that the door post pressure on the vehicles would lead to edge wear on the tires at this altitude. The pressure on the sticker was based on sea level. I add 5 lbs to each door post pressure and have had even wearing tires for the last 10 years. I do the same for the trailer tires. 5 over the max on the sidewall and I have never had center tread wear before the side tread. Your experience may be different but that is my experience.


Turret Class traveler

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