vagroundhog
Chester VA
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My door sticker says to inflate my tires to 65 psi. The sidewall of the tire says max load 3640 @ 80 psi. Whick figure should I use ?
2011 Laredo 266RL
2008 Ford 250 Super Duty V10
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dupreet
High Point, NC
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Joined: 08/03/2007
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Hi,
Do a search for 'tire pressure' and you will get back hundreds of discussions already posted on this topic.
With your rig having a potential 11,000 pound overall weight, running the tires at 80PSI to give you their full weight rating would be my recommendation. You should verify that you have high-pressure valve stems - metal ones would be my choice.
Todd
Todd
1993 Ford E-350 pushed by a 1988 Wilderness 24' TT
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Pipeman
Windsor, Ontario, Canada
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65 when not towing and you should inflate to 80 if you're hauling heavy. I always inflate to 80 when towing my 5er.
Pipeman
Ontario, Canada
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35 year Fire Fighter(retired)
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Vulcaneer
Northern New England
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The door sticker displays the PSI needed for the actual GVWR spec on the trailer axles/wheels. The sidewall spec indicates the needed PSI to support the max load spec for the tire. If you do NOT exceed the GVWR of the trailer axles you can use the Door Sticker spec. And the trailer will ride a bit softer over the road.
If you really do NOT know the loaded weight on the trailers axles/tires the sidewall spec is probably the safest to use. Things in the trailer will move around a little more, as the ride is rougher. But you know you are prepared to carry as much weight as the tires can hold up.
So either is OK. Or somewhere in between, if you know the weight on the tires.
I rarely carry full water and waste tanks. So that saves me some 1500-2000 pounds off GVWR. So I can run at Minimum psi if needed. But I set it a bit higher. So if I lose a little off the top, it is still above the minimum needed.
2006 F350 V10 4X4 SC SB SRW 4.30 22,500 GCWR
2011 Open Range 393RLS 14,250 GVWR
Pullrite Super Glide 18K
Super Duty, Super Cab, SuperGlide
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Campinfan
Washtenaw County, Michigan
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Lets think of this another way.....who would know best about the tires...the automobile manufacturer or the tire company.
Does the tire company tell you what kind of oil to use in your vehicle? Hmmm
________
2008 F 250 FX4 4WD, V10, 4.10 Tow Command
35' 2007 Crossroads Cruiser CT32SB
Wonderful Wife and 3 small kids
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stripit
Casa Grande, AZ
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Joined: 02/24/2004
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Without weighing each tire position and knowing for sure what they are carrying, I would run the max tire pressure. It is very easy to have one side of the trailer heavier than the other side.
Stacey Frank
'04 Mobile Suites 36 TK3 #1341
'99 Int'l 4700 Lo Pro MDT
'08 Lexus 400H
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donn0128
Pronounced Ore-gun
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In reality the door sticker gives you a tire pressure that will provide comfort and some semblance of tire life. When empty I have no problem using the door stickers recommendation. However when towing I always increase the tire pressure to the max as listed on the side wall. And since I am sort of lazy I never drop the tire pressure between trips. Making my tires at 80PSI all the time. Same for my trailer tires, I run them at the max as listed on the side wall. They run cooler and I am never worried about the reduction of load rating by running a lower pressure.
Donn,Lorri,Max (rescued Lab)
Saigon International Airport 1966/67
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Jim Cindy
Northcentral, PA
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2X donn0128. Why fuss, fume and worry about what pressure to run in your tires. Unless you have been to a rally or someplace where you can actually weigh each wheel independently along with the proper tire manufactures chart, you have no idea what the pressure should be. On the RV set it at max sidewall and get on with your life. Many will tell you there is less wear with a lower pressure. Oh goody, I will be able to get 10 to 15 years out of a tire safely good for 4 to 7 years on an RV.
PBH Portable Beach House
2008 GMC 2500HD Duramax Allison 
2009 Cameo 34CK3
MorRyde IS, Disc Brakes, G614's
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Propane fueled Yamaha EF 2400is
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SoakedKarma
Reno neh-va-duh
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You read the tire tread wear..
too low a pressure ~ outer tire edge wear
Too High ~ Center tread ware
No one pressure for all loads...
But than I'm old school and walk around swinging a little bat to check pressures and visually inspect tread..
Good Ripe Watermelon thump is what i listen for.
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boogie_4wheel
SLC, Utah
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This is going to be nothing but opinion...
I've always run max pressure in my tires. I had D range on my 1/2-ton and they stayed at 65psi there whole life; they couldn't have worn any better they were dead flat.
I've got my 2500 at 80psi, always have since the day I bought it. Rides fine to me. trailers are at sidewall pressure, motorcycle at max sidewall, wife's car at max sidewall, ect. I have yet to own a vehicle that wore the middle of the tire from being 'over-inflated' other than my motorcycle but that is a special case.
I also feel that how a tire wears is somewhat dependent on the width of the tire versus the width of the rim that it is mounted on. If you have a wide tire mounted on a narrow rim, it will be more likely to wear the middle of the tread.
Just as don0128 said, I don't have time to go jacking around with pressures for the load that I'm carrying.
'05 2500 Cummins/48RE/3.73, QCLB, 4wd, BigHorn, 74k, 2mic fuel filter on frame, Edge Juice w/ CTS
'10 Forest River Shockwave Toy Hauler 21'
Honda EU3000I Genny
'07 Honda VTX1800 Tourer
'96 Honda XR400R
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