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Open Roads Forum  >  Truck Campers

 > Tire Pressures - who do you trust?

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Tom B

Central Virginia

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Posted: 05/28/02 09:53pm Link  |  Print  |  Notify Moderator

Just put new Michelin's on the truck at Costco and they set the pressure to Ford Reccomendations. Think it's 65PSI Front and 55PSI on the rear duals. Stopped in my local quick lube and decided to spring for the premium service and they set all tires to Michelin's posted side wall pressure of 85PSI (I think).
I voiced my objection and they had to go around and reset which I agree is a pain but I have driven this thing on 75PSI and it's enough to rattle your fillings.
I asked the shop owner if they always use the sidewall settings and he flipped back "Yes and none of the Explorers we've ever worked on had tire failures"

Two Questions for you guys and gals.

1. Do you use tire or truck manufacturers' reccomendations when filling your tires?

2. With a heavy camper load would you increase tire pressures all around?


Tom B and the rest of the gang.
'99 Lance 1110
F350 Crew Cab Power Stroke Dually

BillS

Mount Pleasant, TX

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Posted: 05/29/02 04:59am Link  |  Print  |  Notify Moderator

Yep, like you, I'll going to have to go to Costco and get a set of Michelins in the not too distant future.

I run 65 PSI front and 55 PSI on the rear when driving the truck around unloaded. With the Lance on board, I run the pressures at 80 PSI front and rear(the posting on the tire for max load capacity). I have an air compressor at home so it's easy to change pressures before starting out on a trip. I never unload the camper until I return home and then I lower the pressures again.

I agree, 80 PSI in the dually tires unloaded will shake your filling loose!!

Bill

*This Message was edited on 29-May-02 05:00 AM by BillS*



'03 Lance 1121
'03 Dodge 3500 Diesel Dually

NewmarGuy

Canada

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Posted: 05/29/02 07:09am Link  |  Print  |  Notify Moderator

The tire mfg. have tire max. pressure listed based on loading that tire to its capacity. That being said Ford, GM, & Chrysler all try to keep tire pressure settings lower so the ride does not cause customers to complain. The lower pressure results in a softer ride. The problem occurs when a soft ride results in an under inflated tire flexing too much - the result is tread separation and tire failure - You know like Firestones tire failures - also Goodyear load E tires. It is very important to maintain a pressure in tires to match the load a n d a minimum pressure in tires to prevent over flex of tires. A truck will not ride like a Lincoln Town Car. I usually run my tires close to or at their max rating on the sidewall - I am never sure when I am going to load down my truck and use it primarily for pulling (loaded). When empty I live with the rough ride - its a truck after all.

Kusani

Tennessee

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Posted: 05/29/02 02:02pm Link  |  Print  |  Notify Moderator

I also have a large air compressor at home....and run 55 when not towing, and at the rated 65 max when towing.

Happy Rv'in


Tom B

Central Virginia

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Posted: 05/29/02 07:39pm Link  |  Print  |  Notify Moderator

Thank you


Can't believe I had to edit a two word post! the original said
Thanks you
I am a fool.

*This Message was edited on 30-May-02 06:46 PM by Tom B*


Renato

Jackson, NJ

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Posted: 05/30/02 05:35am Link  |  Print  |  Notify Moderator

Hi Tom,
I also had the same question when I installed new Remington tires on my truck. This is the response I got from them when asking what pressure to use to get the max load out of the tire:

"Renato, following is the information I received from Pat McLaughlin, our Executive Director, who is out of town.

The P255/70R16 SL has a "single tire" load carrying capacity of 2,065 lbs @ 35 PSI."

35 PSI is the max tire rating. I think the max rating is a standard with all tires and should be followed when using heavy loads so the tires don't come apart on you.

Grayden

Fort Wayne, IN, USA

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Posted: 06/03/02 09:02am Link  |  Print  |  Notify Moderator

Since I usually run heavy and fast, I always use the tire manufacturer's pressure numbers. After all what do the vehicle manufacturers know about tires? Racing cars has taught me a lot about tires, their different characteristics, and how they react to different situations/dynamics. I have had the best luck with tires over the road when they are set close to the tire manufacturer's maximum pressure ratings.


*This Message was edited on 03-Jun-02 09:04 AM by Grayden*



G.L. Obenour
2000 F-350, XLT, Crew Cab, PSD, 4x2, LWB, DRW, Deep Wedgewood Blue, Camper Pkg, Towing Pkg (Oct '99), 2000 Lance 920 Truck Camper (Nov '99), 24' Open Car Hauler (Feb '80) "Fun On Board"

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