Nolan
Full-timing
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Joined: 04/15/2001
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Max. Plus check the pressure and the tires themselves every morning we are moving on to a different location.
Nolan and JoAnn
2000 Kenworth T600. (The Little Blue Truck)
2004 NuWa Hitchhiker Champagne 33LKTG
2009 Toyota Matrix
The blog.
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mapguy
Puget Sound
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Joined: 09/02/2007
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Trailer tires seem to hold up better long term with maximum sidewall pressure. Especially the ST class tires.
Two situations where less than max sidewall pressure is called for on a trailer
1. Excessive center tread wear -it must be consistent over all the tires though. In-consistent tread wear indicates other things....
2. Tires with excessive capacity -tires with capacity margins greater than ~20% usually show excessive center tread wear and need inflation reductions.
Never use the tire as a shock absorber (inflation reduction) install the proper devices like shock absorbers and or cushioned equalizers
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ExRocketScientist
Laurel, MD
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Joined: 11/11/2010
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mapguy wrote:Trailer tires seem to hold up better long term with maximum sidewall pressure. Especially the ST class tires.
Two situations where less than max sidewall pressure is called for on a trailer
1. Excessive center tread wear -it must be consistent over all the tires though. In-consistent tread wear indicates other things....
2. Tires with excessive capacity -tires with capacity margins greater than ~20% usually show excessive center tread wear and need inflation reductions.
Never use the tire as a shock absorber (inflation reduction) install the proper devices like shock absorbers and or cushioned equalizers
I agree big time with that last statement. Solve the problem by going at the source -- the crudely designed suspension system. These days, we have solutions that run in the range of the cost of two tires. Without that solution, you just might have to buy three new tires because of blowouts from underinflation trying to solve the problem by reducing the air pressure.
ERS
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SeniorGNC
Houston
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Joined: 10/17/2008
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Michelin E load range LT's rated at 80 psi
Wheels rated at 75 psi
Therefore I inflate to 75 psi
Kevin, DW, 2 DDs, a dog & a cat
1996 F-350, 7.3, manual, exhaust brake
2003 KZ Sportsman 5th, 30' bunkhouse
Disc brake upgrade (DIY)
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azjeffh
Chandler, AZ
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Joined: 09/19/2004
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80 PSI.
Jeff
Wonderful wife Robin
05 F250 Supercab PSD w/Tow Command
05 HR Savoy 29RKS
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luvglass
Milwaukee
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Joined: 12/01/2005
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E rated at 80#
G rated at 110#
H rated at 125#
All ratings should be at the maximum.
Fred Wishnie
2006 Carriage Cameo 35KS3, 2006 Ford F350 diesel dually, fulltimer
See our blog at http://www.mytripjournal.com/wanderingwishnies
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Brad NSW
California
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Joined: 02/17/2009
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I go with the tire load chart the engineers developed, not the side wall MAX.
Here's why: Used to inflate my tires to 80psi, then got a TPMS. Here's what I saw. 80psi leaving San Diego at ambient temp of 55. Hit the desert by ElCentro and ambient temp was 110. TPMS said PSI was 110-115psi and I only drive 60MPH. No wonder I kept passing trailers w/blowouts. They'd passed me doing 70/75. Bet their pressures were over 120psi!
Now here is what I see with my TPMS. Leave SD inflated to 65psi (per chart below). Hit ElCentro and tire pressure is around 90psi. Trailer rides better and I don't have overinflated bombs on my trailer...makes me feel better. Highly recommend you giving it a try. My tires seem to be wearing better too.
For my Maxis 235/80R16E:
weight-psi
2270-40psi
2430-45psi
2600-50psi
2730-55psi
2870-60psi
3000-65psi
3130-70psi
3260-75psi
3420-80psi
USN Ret. 03Ram3500, 5.9CTD, 5spd, SRW, ATS filter, S&B Intake, IssPro (Pyro, Boost, Fuel, Trans & R Dif) SMARTY SR, Prodigy Controller, AirDog 100. 09Montana 3665RE 5er, 6 TST Tire monitors. Pakbrake Ex brake & airbags, 12' Baltik inflatable w/3.3HP OBM
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57 Panhead
Central Valley Calif.
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Joined: 08/19/2010
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I like to do what the tire maker says, this is from Goodyear's web site on RV ST tires:
Tire load inflation chart
Steve
Retired Teamster
2012 Jayco Eagle Superlite 31.5RLTS
07 F250 PowerStroke
U Y B
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diesel man 03
the north country
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Joined: 01/08/2011
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I go with the max on the side of the tire, think the engineer that designed the tire knows what he is talking about.
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