solarity

I was doing some calculations and it seems like the HDPP gets you over the Payload limitation, though you hit another bottle neck, the 1220 hitch receiver limit. I am curious if this formula checks out:

1220 - (WD Hitch) - (Trailer Weight) x (% of Trailer weight on hitch) = Hitch Receiver Limit

1220 - 110 - 8540 x 13% = 0

So with a trailer that weighs 8540lbs and 13% of the trailer weight on the tongue, you will hit the limit of the hitch, way before you hit the limit of the payload or the "towing". These calculations assume you have 1000lbs of payload of passengers, cargo, and WD hitch.

Granted towing something like a boat, which has a much lower percentage of weight on the hitch, can tow a heavier load.

Does the 12200 max possible tow rating for the F150, account for a WD hitch? Also, can you legally/safely replace the hitch receiver to get it over the 1220 limitation?

smokeywren

I get lost within your formula, so let me restate it:


(Receiver hitch WD weight rating minus shipping weight of the WD hitch) divided by 0.13 = max GVWR of any trailer that won't exceed the hitch WD weight rating


1220 - 110 = 1110/0.13= 8538.5 = which you rounded to 8540


So max GVWR of any TT with 13% tongue weight is 8,540.


So any tandem-axle trailer that weighs 8,540 with the average of 13% tongue weight is the max trailer weight you can tow without exceeding the hitch weight rating.


Another useful formula:
GVWR of the tow vehicle minus
the wet and loaded weight of the tow vehicle =
payload capacity available for hitch weight,
minus the weight of the WD hitch =
payload capacity available for tongue weight,
divided by 13% (0.13) =
max trailer weight you can tow without exceeding the payload capacity of your tow vehicle.

7,200 - 6,000 = 1,200 - 110 = 1090 / 0.13 = 8,385


8,385 limited by GVWR (and payload capacity) is less than the 8,540 limited by hitch weight, so payload capacity is the limiter. Of course that assume that the wet and loaded tow vehicle weighs 6,000 pounds. Some will weigh more than that, some less. So you must weigh the wet and loaded tow vehicle if you want accurate estimates.



The tow rating assumes the tow vehicle is "properly equipped" to tow that weight. Without a WD hitch, your tow vehicle is equipped to tow a max trailer weight of about 6,000 pounds, To reach the 12k tow rating requires a WD hitch.



Yes, but only if you can find an aftermarket receiver for an F-150 that has a higher weight rating. Those are available for SuperDuty pickups, but I haven't found one for an F-150. But a stronger hitch receiver does not increase the payload capacity of your F-150, and payload capacity is probably your limiter as to maximum hitch weight.

Ricktwuhk

Need an "If/Then" as in "If tongue weight >1,220 - WD Hitch Then Proceed to Ford Dealer and buy an F-350.

solarity

Granted I didnt take 5th wheel into account, when I wrote this...

smokeywren

Same basic formula except use 18% pin weight instead of 13% tongue weight. GVWR is the limiter, and GVWR doesn't change to accommodate different types of RV trailers. For a gooseneck trailer, use 20%.