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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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Old Mar 12, 2014 | 12:55 PM
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I have been looking into some new wheels for the truck. I will keep the same back spacing and diameter. My main question has to do with load ratings on the wheels. Some of the steel wheels are rated at 3100 lbs per wheel (16X8") and others at 3200 (16X7"). I know I plan to tow with this truck and want good looking wheels on it too. What's going to be my best choice as far a wheel load rating.

Additional information: I will be running 10 ply tires (E load range, I believe) and approximately 31 inch tire diameter. As a street truck, it will not need anything larger and lifting tends to lower your payload and towing capacities. Tire width will be determined by rim selection as the rim will be 70-80% of the tire width.
 
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Old Mar 12, 2014 | 02:26 PM
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My current KL78's in 235/85 r16 E are rated at 3042#'s each.
It seems either rim is not the determining factor.

75% of 235 is 6.9389"
So a 7" rim would be ideal for that width.
 
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Old Mar 12, 2014 | 04:05 PM
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Originally Posted by ArdWrknTrk
My current KL78's in 235/85 r16 E are rated at 3042#'s each. It seems either rim is not the determining factor. 75% of 235 is 6.9389" So a 7" rim would be ideal for that width.
The 10 ply tires I was considering are 265/70R16 for a 16X8 rim. The extra inch drops 100 lbs of load rating. Not sure why. Do we have an engineers on here that can explain that? I also see that 16X7 wheels are harder to find.

These numbers are for steel wheels in the same style. *shrug*
 
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Old Mar 12, 2014 | 04:20 PM
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Same pressure (80psi) on a wider wheel= more force.
It makes sense to me.

I think my truck has 6.5" rims.

Like I said, if the tire is rated for less than the rim it is on, what does it matter?
 
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Old Mar 12, 2014 | 04:54 PM
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The bigger the wheel is, the more area it has to break.
Take a paper towel roll, now stand on it. It crushes it easily. Now make a 2in section and stand on it and it will support you.

Not an engineer, yet.
 
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Old Mar 12, 2014 | 07:21 PM
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Originally Posted by ArdWrknTrk
Same pressure (80psi) on a wider wheel= more force. It makes sense to me. I think my truck has 6.5" rims. Like I said, if the tire is rated for less than the rim it is on, what does it matter?
Maybe I am just overly paranoid. Max total weight for this rig using the bed is about 8100#. That's loaded with 3/4 ton of cargo in the back. I just want the strongest I can get. I'm also unsure of the physics involved in towing more than 3000# and the effect on the wheel/tire setup when loaded with 5-6000#. My Ford has to trailer the Nissan in an army move, which could be 6-7 days on the road. I want to prevent problems before they happen.

As for the tires, the ones I'm going with are installed on current Super Duty's as factory replacements. Not too concerned there.
 
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Old Mar 12, 2014 | 07:46 PM
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What is your gvwr? That minus the weight of the truck is the max you can put in the back. Legally. Now I've had 8-10k behind my truck and I know my gvwr doesn't allow that but it didn't look bad
 
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Old Mar 12, 2014 | 07:48 PM
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You have a 3/4 truck with a gvwr of 8100, correct?
That means the weight of your truck from that 8100 is hire much you can haul. Say you weigh 4k. That leaves 4.1k to be put on your four tires.
 
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Old Mar 12, 2014 | 08:21 PM
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Trailer weight doesn't subtract from GVWR, just the tongue weight.

My F250 has sway bars front and rear and GVWR of 8600#.
with trailer brakes I am only limited by my class IV hitch which is 12,000# and 1000# TW.
 
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Old Mar 12, 2014 | 08:27 PM
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From: Where the Army sends me
Originally Posted by dylansf23
You have a 3/4 truck with a gvwr of 8100, correct? That means the weight of your truck from that 8100 is hire much you can haul. Say you weigh 4k. That leaves 4.1k to be put on your four tires.
Truck weighs in at 6600. I just added the 3/4 ton to get the max. I'll double check tomorrow. Looks like I am being slightly paranoid.
 
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Old Mar 12, 2014 | 09:51 PM
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trailer weight does though. It's called the tongue weight, just like a fifth wheel is used to distribute the weight better over the whole truck. Most people don't weigh just the truck with a trailer attached.
I don't even know what my gcwr is.

Yes you are being paranoid. Just don't go to a weigh station with a lot of cops. Some places force you to go through, but since you have a old pickup truck, they will wave you through. At least that is my experience.
The south, where I live, isn't to strict with a pickup truck, however you can just get a weighted tag and be covered to haul what ever your licensed to.
 
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Old Mar 12, 2014 | 09:54 PM
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Look at what I said.

Max tongue weight 1k, trailer weight 12k.

There is a DIFFERENCE.
It is NOT called tongue weight.
 
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Old Mar 12, 2014 | 09:59 PM
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Oh aha yeah sorry must have read that wrong.

Did your truck come with sway bars? How does it handle?

I know I'll need sway bars to haul another diesel f250 with a car trailer, emphasis on the car part.
 
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Old Mar 12, 2014 | 10:11 PM
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Yes. Mine came with the factory towing package.

Is a car trailer ever rated for the weight of a diesel F250?
Will it fit?
 
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Old Mar 12, 2014 | 10:32 PM
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Well it had a gvwr of 4800...And weighed close to 2

And yeah it fit no problem. If you look at the thread about being new here, I think it's on the front page, you can see it.

And ah I wish mine did, I feel like trucks handle better with them.

I also have a 96 psd that we haul our tractor on that handles fine. Never thought about car trailers not being that heavy duty every where. And A big rig blew by me on the interstate just as I was hitting my wobble speed. Man that was fun.

My stock engine pulled it great up a mile grade of atleast 12% from a stop. And I have a 300 with t18 and 285/75/16 tires with a 3.54 rear end.
 
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