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tire pressure

Yahoo Message Number: 6176
Has any one in this group used "TIRSENTRY"? Or any other tire monitor other than smart tire- and if so- How do you like it?

Stan and Joni Vander Ploeg
Intrigue #11556 Full Timing

Re: tire pressure

Reply #1 –
Yahoo Message Number: 6178
I have it on 8 tires in the MH and 4 on the toad. I have dected a low tire on the inside dual and one on the left front on the toad. The alarm is set 10 percent below the operating pressure and is transmitted to a dash 2 inch gauge showing the location of the signal. I think it is great.

John Drebick affinity 6194

Re: tire pressure

Reply #2 –
Yahoo Message Number: 6179
We tried to get TireSentry, but when we were looking for a tire monitoring system, their monitors couldn't fit the Jeep wheels we have, so we went with SmartTire only for the rig and are hoping to get one for the Jeep soon. It seemed like a really good system from all our research.

Jan McNeill, Fulltimer
2001 Intrigue 11320

tire pressure

Reply #3 –
Yahoo Message Number: 12921
i am looking for some advice if anyone can help. i just checked all the tires on my new 04 intrigue 42' ovation and found that the dealer has them set at 90#s. is this a good setting or should they be higher? i thought i had read somewhere that our tire pressure should be around 100 - 110 #s any comments will be very helpful. thank you scott

scott & deb drown
04 intrigue # 11729

happy trails from apple valley, ca

Re: tire pressure

Reply #4 –
Yahoo Message Number: 12924
Scott, take your coach and have it weighed. Then get out your chart for your tire specs and air your tires accordingly. Your dealer probably set the pressure for the empty weight. Hope this helps, Dale Hollick

Re: tire pressure

Reply #5 –
Yahoo Message Number: 12927
Scott,

Depends on the tire and weight of the coach at each wheel. If you have Toyo tires, take a look in my folder in the files section and there is an inflation chart for various size tires.

Jim Hughes

2000 Allure #30511

Re: tire pressure

Reply #6 –
Yahoo Message Number: 12929
I have the same coach, 110 lbs front/ 95 to 100lbs rear. I would get the coach split weighed just to make sure. Mine has difference of 50 lbs in front and 40lbs in the rear with driver and passengers aboard. I have 60 lbs of house cats aboard ie. 3 and Have no clue where they were at the time.
Sometimes I drive over 65 and, therefore add at least an extra 5 to 7 lbs. per tire. TWI 2004 Ovation 11731 PS I have the ISL, if you have the CAT thats another bunch of weight requiring more air.

Re: tire pressure

Reply #7 –
Yahoo Message Number: 12949
Don't trust a dealer to put the correct amount of air in the tires. Last year at Beaudry/Tucson I gave them the weight chart and the amount of air to put in, and they put 110# all around. This spring at Evergreen, I told them how much air, and when I drove off the SmartTire went crazy. Again 110# in all tires. Why don't these people listen????

Ree

Current location---Victoria, TX---where it rained nearly 7 inches this evening. Not fun!

2003 Allure 30852

Home is www.eldoradoranch.com near www.sanfelipe.com.mx

Repainting Roof

Reply #8 –
Yahoo Message Number: 12957
I repainted the Magna myself. It cost me about $120 for various materials. The paint, I made myself. I'm a research chemist for a paint company. [/tt] The urethane is a polyester/acrylic which is mixed with a isocyanate. Very similar to Duponts Emron automotive paint and Sikkens urethane. Took me about two weeks in my spare time to prep the surface and about two hours to paint. Several others in the group have had their roofs redone. No sure what coatings were used. I was very unhappy with the white streaks down the sides from the deteriorating polyester gel coat.
Steve
- 95 Magna 5220

Re: tire pressure

Reply #9 –
Yahoo Message Number: 12962
Ree

For libility reasons dealers are now putting the maximum air in tires unless you tell them in writing what you want. At Lazy Days if you tell them to put air in your tires, they will put in 120 unless you tell them you have weighted the coach and only want 95 pounds etc depending on the weight. One time my service writer forgot to write down the air I wanted and I got 120#. Then I had to let some out but thats ok, they are just protecting us from ourselves. How many people on this site have had their coach weighted properly and know exactly what air pressure they need? From the notes I see, not many.

Bill G. 2005 Magna #6425

Re: tire pressure

Reply #10 –
Yahoo Message Number: 12963
Quote
(snip) > How many people on this site have had their coach weighted properly and know exactly what air pressure they need? From the notes I see, not many.

We had our previous motorhome and our Intrigue weighed by RVSEF (formerly A'Weigh We Go). In addition to the comfort level of knowing the correct tire pressure, it was nice to discover that our Intrigue is ~3,800 lbs below GVWR when fully loaded (including full water tank). We haven't increased the amount of junk we carry in response to that, but it is nice to know that we'll never come close to our GVWR.

Dick (& Geri) Campagna
'98 36' Intrigue #10571
Mfd: 11/97

Re: tire pressure

Reply #11 –
Yahoo Message Number: 12967
Yeah, we've learned that we have to double check the service people too...we found Evergreen inflated our tires when we went in for a "service appt."...all of them were the 120# like you mentioned.
Figured that out when the Smarttire went crazy. We, too, have had our coach weighed and have set our tire weights according to Toyo's recommendations. I've even talked with the fellow at Toyo to confirm the inflations since they were so different from what we kept hearing people used! He's the one who made a nice "weighing directions" that are included in our Toyo packet in the file from CC. If people follow that, it's pretty easy to determine correct pressures. One also gets a much nicer ride and handling when they're done correctly.
Jan McNeill

2001 Intrigue 11320

Re: tire pressure

Reply #12 –
Yahoo Message Number: 12968
Jan, I'm glad someone else uses the charts. I've been called crazy because I carry 85# front and 75# rear duals and tag, but that's above what the chart calls for, and I get A superb ride. After 33,000 miles at these pressures I have no noticeable wear on the tires.

Walt Rothermel
03Allure30811

Re: tire pressure

Reply #13 –
Yahoo Message Number: 12969
Could someone help me understand why the charts show higher psi for the duals than for the singles at the same weight. For example, 12R22.5 show singles at 95 psi for 6150 lbs and show 105 psi for the duals for 6140 lbs....I had been led to believe that a set of duals would carry more weight per psi than a single would ???.......

So in theory, and just for an example (not that this could ever happen), if you had a coach that weighed 6150 on each front tire and 12300 on each set of duals, then you would inflate to 95 in each front single tire and 105 in each dual. I must be missing something, right ???

Ray and Rue
05 Allure 31176

Re: tire pressure

Reply #14 –
Yahoo Message Number: 12975
Quote
(snip) > So in theory, and just for an example (not that this could ever happen), if you had a coach that weighed 6150 on each front tire and 12300 on each set of duals, then you would inflate to 95 in each front single tire and 105 in each dual. I must be missing something, right???

A tire, when used as a single, may have a 6,000 lb capacity (at maximum pressure), but only have a 5,800 lb capacity at the same pressure 'cause the tire is subjected to higher heat buildup from being close to the engine, exhaust system and its sister dual tire.
I use a Raytek MiniTemp infrared thermometer "gun" to check tire temps whenever we stop and the inside duals are always warmer than the outside duals.

Dick (& Geri) Campagna
'98 36' Intrigue #10571
Mfd: 11/97

Re: tire pressure

Reply #15 –
Yahoo Message Number: 12976
I'm getting confused and lost in the forest because of details.
Please, someone, just answer this one single question . Once you've determined the pressure you want your tires inflated to, should this the pressure when tires are cold - or hot?

Tom

05 Magna on order and now thoroughly confused on what to do about tire pressure.

Re: tire pressure

Reply #16 –
Yahoo Message Number: 12977
Ray and Rue, what you have been led to believe is incorrect. And it is not just the Toyo that has this relationship between single and dual. It is all tire that I have ever seen. You are not missing anything as your calculations are correct.

George in Birmingham, AL
Allure 31038
George in Birmingham
2003 Magna 6298

Re: tire pressure

Reply #17 –
Yahoo Message Number: 12978
Tom, the specification is for cold tires. Cold means roughly ambient temperature.

George in Birmingham, AL
Allure 31038
George in Birmingham
2003 Magna 6298

Re: tire pressure - two cents worth

Reply #18 –
Yahoo Message Number: 12979
Hi Folks,

Another issue is altitude. At 8000 ft pressures are different.
A real analysis was presented early in this groups life. pv=nrt & p1v1=p2v2

Fred Kovol

Re: tire pressure

Reply #19 –
Yahoo Message Number: 12980
Thanks, George. That is what I assumed.

I appreciate your uncomplicated response.

Tom

Re: tire pressure

Reply #20 –
Yahoo Message Number: 12981
[Country-Coach-Owners] Re: tire pressure George, is it possible that the higher psi for duals is manufacturers' CYA to avoid side-wall bulge which could cause the duals to rub against each other, as will happen if too-wide tires are installed of if pressures are too low, or due to flexure when going over bumps in the road.

Dave Fagen
1989 32' SE

Re: tire pressure - two cents worth

Reply #21 –
Yahoo Message Number: 12982
Don't forget temperature ; PV/T=PV/T

TWI 11731 2004 Intrigue

Re: tire pressure

Reply #22 –
Yahoo Message Number: 12983
According to Jim at Les Schwab, cold is defined as 40 deg. F. For every ten degrees above 40 you add so many lbs and for every ten degrees below 40 you subtract. But I can't remember the fidge factor.
TWI 2004 Intrigue 11731

Re: tire pressure - two cents worth

Reply #23 –
Yahoo Message Number: 12985
Hi Folks,

There are many derivations to the two formulas as the reply from TWI gives one.

Now consider this:
1. As you climb the outside atmospheric pressure goes down and the corresponding inside tire pressure goes down because the tire gets slightly bigger. But at some point the tire can't get bigger, so the pressure goes up inside the tire as you climb higher.
2. The tire gauge reads gage or relative pressure. Therefore, as you
climb, the outside pressure goes down, the tire gauge reads a higher value if the pressure inside the tire remains the same. Note - if you used an absolute pressure gauge, its value would change under a different set of rules.

So, is it true, that as you climb the tire gauge reads a higher value or a lower value and why? It's important to know this and why you should or shouldn't adjust your tire pressure when at altitude.
My answer is, if you are at or close to sea level, that's where you adjust your tire pressure. And if you live above 1000 ft, adjust your tires at the elevation you live in and only adjust your tire pressure at that elevation.
Fred Kovol

Re: tire pressure

Reply #24 –
Yahoo Message Number: 13007
Walt,

I think you are carring to little air in the rears. Most tire dealers say we should not go below 85 pounds even though the book says you can. At 75 pounds you have no room to lose some air before you need to put some in and that low pressure may make your duals come closer to each other and rub. I also carry some sewage in my holding tanks when on the road and thats why the extra pressure is necessary for us. 50 gallons of sewage will weigh 450 pounds. We run at 95 in the rear and that is 10 pounds above what the book says for our weight. We also run 110 in the front and that is 10 pounds over what the book says. Have run this way for 10 years and never had a tire problem except for an air leak from valve extenders which we no longer use.

Bill G. 2005 Magna #6425