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Tire PSI while towing

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Old Oct 12, 2010 | 07:03 PM
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Tire PSI while towing

Hi All

I am leaving tomorrow on a trip and will be towing a 7-8k lb travel trailer. I have a 2005 F350 and the door sticker says tires should be 65 up front and 75 rear standard. I have stock tires. Cant remember who makes them but on the tire it says 80psi Max load. The tire name starts with a C if that helps. Should I fill all four to 80psi? Thanks
 
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Old Oct 12, 2010 | 07:12 PM
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Originally Posted by hifiman
Hi All

I am leaving tomorrow on a trip and will be towing a 7-8k lb travel trailer. I have a 2005 F350 and the door sticker says tires should be 65 up front and 75 rear standard. I have stock tires. Cant remember who makes them but on the tire it says 80psi Max load. The tire name starts with a C if that helps. Should I fill all four to 80psi? Thanks

Mine says 60 up front and 75 at rear and that is what I go by. My tires are Pirelli Scorpions and are the factory tires. I tow a 31' 5er and loaded is probably 13 to 14 k.
 
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Old Oct 12, 2010 | 07:18 PM
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I have nitto dune grapplers and say max wait at 80 psi. I tow a 15-16K 5er toy hauler and usually run my fronts at 75 and rears at 80. I get a little more squirm at lower psi but that might just be because of the type of tire I use.
 
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Old Oct 12, 2010 | 07:23 PM
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Thanks. They are Conti Trac TR tires. I am hearing I should start out at door spec and adjust if needed. Thanks again.
 
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Old Oct 12, 2010 | 07:32 PM
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Originally Posted by hifiman
Thanks. They are Conti Trac TR tires. I am hearing I should start out at door spec and adjust if needed. Thanks again.

Door spec is what the vehicle is designed for with the stated gvwr.
 
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Old Oct 12, 2010 | 09:55 PM
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small trailer, 65 psi front, 68 psi rear is about right for me.... Load truck too, then try 75 rear....
 
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