jrp
SD, CO, NM
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Joined: 03/22/2005
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Sully2 wrote:
The tire sidewall pressure is a MINIMUM pressure for use when the tire is carrying its MAXIMUM rated load.
Sully must be suffering from too many adult beverages over the holiday, or from celebrating too many Bengal wins.
The tire sidewall is always required to show the Maximum Cold Inflation Pressure and the Maximum Load Capacity
Jim
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topflite51
In The Desert of Nevada
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Joined: 05/13/2004
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jrp wrote:Sully2 wrote:
The tire sidewall pressure is a MINIMUM pressure for use when the tire is carrying its MAXIMUM rated load.
Sully must be suffering from too many adult beverages over the holiday, or from celebrating too many Bengal wins.
The tire sidewall is always required to show the Maximum Cold Inflation Pressure and the Maximum Load Capacity Talk about slow learners. It is just like SULLY2 said. We are not talking about passenger or light truck tires. The tire pressure listed on the sidewall of most Cl A MHs is the MINIMUM pressure required to support the MAXIMUM rated load. If you don't believe it, get down on your knees and read what is molded into the sidewall. When I say most, this applies to 19.5 and 22.5 tires.
 David
Just rolling along enjoying life
w/F53 Southwind towing 87 Samurai looking to golf or fish
Simply Despicable 
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kaydeejay
SE Michigan, USA
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Sully2 wrote:kaydeejay wrote:The tire sidewall pressure is a MAXIMUM pressure for use whe the tire is carrying its maximum rated load.
Your coach manufacturer has determined that 80psi is the correct pressure for the load the coach puts on the tires. Assuming the tires are the original size, stick with their number.
Close....
The tire sidewall pressure is a MINIMUM pressure for use when the tire is carrying its MAXIMUM rated load. Agreed, but it's also the MAXIMUM pressure as rated by the tire Manufacturer.
Does that make it a "Minimum-Maximum" or a "Maximum-Minimum"? 
Keith J, Retired from GM Engineering
1999 Sunnybrook 27RKFS Fiver
2005 GMC Sierra 2500HD SLE 2WD/CC/SB/DA, 52 gal Titan tank, Bilsteins, Line-X, Westin steps, Prodigy, Retrax, 16K Superglide, 5th-Airborne pin box, Multi-vex mirrors, TST TPMS.
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BobGed
Coeur D' Alene, ID
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Kinda six of one, half a dozen of another. 
My Michelin 275/80R22.5 XZA3 read as follows:
Max Load Single 7160# at 120 PSI Cold
Max Load Dual 6610# at 120 PSI Cold
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sum1
So-Cal
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Joined: 11/07/2005
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I use the tire mfr's charts to determine the minimum pressure for a given load. I then add a healthy safety margin to account for vehicle dynamics, improve responsiveness, and to reduce tire temps.
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ejforwood
Littleton (Denver) Colorado
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wolfe10 wrote:RVSEF does weighings around the country.
http://www.rvsafety.com/index.html
Their 2010 schedule (per phone conversation this date) should be out next week. But you can contact them by e-mail or phone.
Also, many state truck weight enforcement divisions will be happy to do individual wheel position weighings-- usually at the beginning or end of their shift at their HQ.
You can get axle weights at many trucks stops, but that ASSUMES perfect left/right weight distribution. An ASSUMPTION you shouldn't make.
Thanks for the link but, the closest to me on the list for last year was 7.5 hrs away across a 10,857 ft. pass.
Jerry, Dottie & Chan, "the little furry one"
98 Bounder 34V, 99 F-53 Ford V10 chassis
06 Saturn VUE 4I
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thunderstruckhd
Ft.lauderdale and Key West,Florida
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Sully2 wrote:stripit wrote:The tire pressure posted on the tag next to your seat is that pressure needed to closely match the gross axle rating numbers. It is not necessarily the correct air pressure for your rig. As others have posted you need to weigh your rig, best by wheel position, but without knowing your weights, you have to at least follow that tag.
Absolutely correct! If one doesnt KNOW...then error to the safety side and run the pressure stated on that placard!
EXACTLY, best advise here.
* This post was
edited 12/01/09 02:13am by an administrator/moderator *
2006 Allegro Bus, 42QDP, 4 Slides, Tag axle, Spartan, 400ISL.
Progressive Ind.PT50C
TST TPMS
Assorted toads,trailers and toys.
And Zoie the Doberman.
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wolfe10
Texas
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I suspect they will be at the Albuquerque FMCA Convention in March. Are you planning to attend?
Brett Wolfe
1993 Foretravel 36' U-240
Cat 3116, Allison 3060
Caterpillar RV Engine Owner's Club: www.catrvclub.org
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thunderstruckhd
Ft.lauderdale and Key West,Florida
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kaydeejay wrote:Sully2 wrote:kaydeejay wrote:The tire sidewall pressure is a MAXIMUM pressure for use whe the tire is carrying its maximum rated load.
Your coach manufacturer has determined that 80psi is the correct pressure for the load the coach puts on the tires. Assuming the tires are the original size, stick with their number.
Close....
The tire sidewall pressure is a MINIMUM pressure for use when the tire is carrying its MAXIMUM rated load. Agreed, but it's also the MAXIMUM pressure as rated by the tire Manufacturer.
Does that make it a "Minimum-Maximum" or a "Maximum-Minimum"?
Most tire ratings are MAXIMUM PRESSURE. But the argument does not matter because no mater if its MAX or MIN pressure IT WILL BE SPELLED OUT ON THE TIRE SIDEWALL. It will state "maxumum pressure" or "minimum pressure"...
One step further the "manufacture recomended pressure" trumps all, go with that...
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Jim@HiTek
Gresham, OR, USA
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In Oregon, when the weigh stations are closed, the digital readout scales are still 'ON'. So, just go to your highway weight station there in Colorado on a Saturday afternoon when there is no one there and test it out.
Jim@HiTek
Have shop, will travel!
Visit my travel & RV repair blog site. Subscribe for emailed updates.
Fleetwood Bounder, '94
Cummins Diesel, 190HP, 36.5'
Black Rock Lava Park, Nevada
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