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Open Roads Forum  >  Tow Vehicles

 > Tow vehicle tire pressure??

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Former FAM

Western WA.

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Posted: 02/28/12 03:32pm Link  |  Print  |  Notify Moderator

OK, this is all new to me so here goes...

After 15 years of talking, 2 years of kinda looking, 8-10 months of research and shopping, we finally bit the bullet and bought our first travel trailer...

I put new tires on the truck last November and since I've never pulled anything near this big before and I'm curious as to what pressure would be best to run on the truck.

I'm running Nitto Trail Grappler MT tires at 40-42 psi for normal driving. The max pressure on the tire is 80 psi @ 3640 lbs. What tire pressure should I be at with my truck loaded with me the wife 2 little kids, our big dumb dog, a tank of gas, and a 5000 lb (dry weight) trailer???

I'll be off next weekend so we're going to load up and get the actual weight a nearby state DOT scale.

thanks in advance, and I'm sure I'll have many more questions...

Dave


TT: 2012 Keystone Springdale 260 SRTWE
TV: 2005 Ford F-150 Lariat Supercrew 4X4
Equal-i-zer WD Hitch with Sway Control
Prodigy Brake Controller
Edge products Evo HT programer


bicyclemark

Saint Paul, MN

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Posted: 02/28/12 03:37pm Link  |  Print  |  Notify Moderator

I run mine at 80 whenever towing or carrying a load. I get better handling and gas mileage.

Former FAM

Western WA.

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Posted: 02/28/12 03:40pm Link  |  Print  |  Notify Moderator

Front and rear?

Old-Biscuit

Verde Valley

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Posted: 02/28/12 03:40pm Link  |  Print  |  Notify Moderator

When towing..run the rear tires at MAX PSI (80#) and front tires at 65psi.
Then when you get actual weights for truck and for truck/trailer combo you can go to tire mfg. website and look at tire loading charts and adjust tire pressures according to actual load.

Also.....check data sticker on door post/glove box and hat is stated in your owners manual for recommended psi for towing.

VintageRacer

Tatamagouche Nova Scotia

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Posted: 02/28/12 03:47pm Link  |  Print  |  Notify Moderator

My door sticker tells me the pressures for full load, which happen to be 80 rear, 65 front, and that's what I run. But - your truck probably didn't come with the higher rated tires you have on it now, so that might not work for you. Easy solution is run the 80/65, it might be too high for theoretical idealness but the tires will be happy.

Brian


2005 F250 Supercab, Powerstroke, 5 speed automatic, 3.73 gears.
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1980 MCI MC-5C highway coach conversion
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goducks10

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Posted: 02/28/12 04:07pm Link  |  Print  |  Notify Moderator

What rims do you have?

Former FAM

Western WA.

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Posted: 02/28/12 04:52pm Link  |  Print  |  Notify Moderator

the stock 18 inch Lariat aluminum rims

Terryallan

Foothills NC

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Posted: 02/28/12 06:26pm Link  |  Print  |  Notify Moderator

Former FAM wrote:

the stock 18 inch Lariat aluminum rims


You better check the max psi for the rims. I'm bettin, 80 psi is way too much. You may have more tire that you got rim.


Terry & Shay
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04 F150, 5.4, Lariat SuperCab
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wcjeep

Tacoma, Wa

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Posted: 02/28/12 06:36pm Link  |  Print  |  Notify Moderator

Find the max pressure for the rims.

SWD

Land of Living Skies

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Posted: 02/28/12 03:52pm Link  |  Print  |  Notify Moderator

bicyclemark wrote:

I run mine at 80 whenever towing or carrying a load. I get better handling and gas mileage.


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