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Old 10-23-2014, 01:18 PM   #1
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More from Ford F-350 6.7 V* Diesel 4WD SRW Crew Cab, Long Bed

Ford F-350 6.7 V* Diesel 4WD SRW Crew Cab, Long Bed
Thank you for all the helpful responses. These are the weight recommendations I compiled from the responses from 5 different sites:
Can you tell I’m OCD and obsessed with numbers?...
11,000 1 recommendation
11,850 1
12,000 3
13,500 1
14,500 1
15,000 2
I’ve averaged that out to about 13,000 lbs.

SO, along with the response averages and my calculation results (Assuming that we won’t max the truck out to its GVWR)
I think we will go out on a limb and shoot for a 5er with a
dry weight of 9500-11,000 and/or GVWR under 13,500.

Am I on the right track? I’ll go with the majority answer…
Thanks,
Pam
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Old 10-23-2014, 05:24 PM   #2
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Your figuring sounds solid. The only recommendation I would make is to go with dual rear wheels. The ride will be more stable with a 5er and give you some extra GVWR to play with for a safety cushion.
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Old 10-23-2014, 06:24 PM   #3
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I read some of your other thread. Everybody can't be right.

Your truck will tow a bigger 5th wheel trailer than the 13,000#s you have settled on.

Here is the official Ford chart.

2015 Ford Super Duty | View Towing Specifications | Ford.com

I see your truck rated for 15,700#s - 5th wheel, diesel, crew cab, 4x4, SRW
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Old 10-23-2014, 07:06 PM   #4
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Looking at your numbers from your other thread...

Quote:
In other words, are there other considerations and options that would increase our towing capacity?
Here are our numbers:
GCWR 23,500
GVWR 11,500
GAWR-Front 6,000 actual: 5200 weighed on scale
GAWR-Rear 7,000 actual: 3820 weighed on scale
GVW 9,020 Weighed at scale with passengers, fuel, & cargo (but no 5th wheel hitch)
Max Tow Rating 15,900

Here are our calculations for a 14,500 lb loaded 5th Wheel:
GCWR 23,500
- GVWR 11,500
12,000 3,900 lbs less than quoted towing ability (15,900 lbs)

GCWR 23,500
-GVW 9,020 Actual truck weight GVW
14,480 1420 lbs less than quoted towing ability (15,900 lbs)

Pin wt. for 14,500 lb 5ver x 20% = 2900 lbs

2,900 Pin Wt for trailer adds 2900 lbs to back of truck
+ 9,020 Truck Wt
11,920
420 lbs OVER truck's GVWR of 11,500 lbs
and just 312 lbs UNDER rear-axle limit of 7000 lbs
2900 + 3788= 6688 pin Wt + rear axle wt

Hitch weight is the big limitation to you truck (price of SRW).

Here is the Ford towing guide: Ford Towing Guides | The Official Site of Ford Vehicles | Ford.com

They say hitch weight/king pin weight) should be 15%-25% of trailer weight.

My hitch weight (Chevy truck and toyhauler) runs around 17.5%

Truck and Trailer -
Steer axle - 4480
Drive axle - 5960
Trailer axle - 10820
Gross Weight - 21260

Truck only -
steer axle - 4500
drive axle - 3660
gross weight - 8160
I can use these numbers to figure my hitch weigh and trailer weight.
hitch weight - 5960 - 3660 = 2300 (17.5%)
trailer weight - 10820 + 2300 = 13120 (trailer rated to 13,800#)

Conclusion - you need to be cautious about hitch weight if you buy a trailer that grosses out more then 13000#.

There is a thread on this forum where people posted the weight of their rigs. I can't find it right now. It was eyeopening for me to see the variation of pin weight percentages between different manufacturers.
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Old 10-23-2014, 08:33 PM   #5
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Quote:
Am I on the right track? I’ll go with the majority answer…
Thanks,
Pam
I've never heard of anyone buying a trailer for their truck based on what the majority of a dozen or so answers were on a RV forum.
We have some folks on this forum that claim a DRW is needed for anything over 10k-12k lbs or a mythical length.

I would use Fords tow ratings recommendations for your trucks configuration.
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