Did you tell those "engineers" that you`ll be using a suv with 8600lbs towing capacity to tow that boat with?
What`s that boat weight ? 15K#?

I think you're mask is on too tight... Get some oxygen and calm down kid. You obviously don't know anything about the mechanics of how things work and you certainly don't know what the actual weights are. Not even close. Stop being a reactionary person that yaps a lot about what they don't know.
My Expy has a GCWR of 15,300. Trailer weight max for the Expy is 9,200. My boat is 8,500. The aluminum trailer weight must put me way over lol. Braking is the biggest part of the trailering equation. Have you ever even seen an Expy's brakes? There's plenty of good stopping power there on their own. It has huge rotors and calipers and linings. Like I said before, yes, the trailer brakes do their job also which is important no matter what you tow with. Wheelbase? What's your point about that? You think a regular cab or even an extended cab has a ton longer wheel base than my Expy EL? A standard '99 F350 for instance is 137". My Expy is 131". That 6" difference huge... You haven't even mentioned tires which tells me you really don't know much about towing. I have D rated tires. Tried for E, but couldn't get them.

Oh my, If it works for you and you're proud of it, more power to you! Appears as if.
But when you post that on here and then argue as if that combination is as sure footed and safe as any of the "heavier" duty stuff.
And accuse someone else of this; "You obviously don't know anything about the mechanics of how things work"

YOU'RE throwing your self under a heavy fast moving bus!

Most on here, me included, like to have a decent margin of safety when it comes dragging stuff down the highway regardless of what the manufacturers GCWR numbers are.
Your Expedition has the same brakes as an F150.
An F250 as a "next size up" comparison has an average 1" larger diameter rotor front and rear.
And here's an Expedition rear caliper compared to a F250 rear caliper.
HMMMM

OH MY! Yes dear, you got me. I concede... Have a nice day gents.

Cheech just busted your fantasy bubble but I`m sure you still don`t get it .

You think your tow rating is 15,300 #`s, I have no mechanical ability and I don`t have experience with towing and that big ass cruiser weights less than my 33 baja (12,500#) and wheelbase makes no difference in towing?
Jesus you are really delusional.or really bad at math. .. okay . Keep living in your fantasy world.

I don`t know what year your expedition is but the 2006 was their best year and it shows 8600# please show me where it says 15, 300. I`ll wait.
https://trailers.com/tow-capacity/20...age%20required

Please do concede because you`re wrong in everyway and then some, good luck trying to stop that thing with those baby brakes and rotors, oh wait the trailer will stop it it`s fiiiine. Not sure why I use a dually when my wifes Jeep cherokee could obviously tow just great .

Many people look at towing capacity ratings from the manufacture and figure just because it is rated at that number everything should be fine. A couple of years back if you look at the F150 vs F250 with the 6.2, the F150 was rated to pull more weight. That was because the standard had changed and manufactures based the rating on what the engine could pull vs. the weight of the vehicle. So if you took the same engine out of the F250 or F350 and put it in a lighter weight F150 it could pull more. NOT stop more. In my line of work I have seen many vehicles pull way over there rated capacity just not for long, usually the lighter weight brakes, frame, mounts etc. give up much quicker, add normal wear and tear and corrosion and your asking for problems.

You're like a dog with a bone aren't you? Archie Bunker had a name for guys like you lol Breath easy, read slow, and try to comprehend the following information. This goes for Cheech too that posted the incorrect pics.

2017 Expedition EL 3.73 4x4 (Baby Brake Edition)
97 Sundancer 290 32' OAL

lol. so a whole 9200 lbs of towing capacity.
Nice try on the weight of your boat.
A 33 Baja is rated at 7500lbs but guess what, the real weight is on trailer is 12,500 , I`ve put it on a scale , so if you think that cruiser is 8500 lbs and all is fine you`re dumber than I thought. Go put it on a scale and get back to me.
Still waiting on that 15,300# tow rating sheet .

Now see, I asked you to read real slow so you might be able to comprehend. Is it the english that's troubling you? I never said my tow rating was 15,300. Just to remind you what I actually wrote... And I thought the best Expedition was in 2006 and was only 8,600? What happened to those facts you spewed?
"My Expy has a GCWR of 15,300. Trailer weight max for the Expy is 9,200. My boat is 8,500".
I'm sure you don't know what GCWR is even though you seem to think you're an expert on trailering so I'll spell it out. Gross Combined Weight Rating. That's truck and trailer weight combined. I won't try to show you how to calculate it because I wouldn't want you to strain yourself. My boat is 8,500. Maybe less because there isn't a genset in it now.

Yeah I'll update now that you've pinpointed your year.
They're even worse than the later year one I posted earlier.

Also, it appears you're relying on a NADA guide for the weight of your boat. I'm not so sure that's a real accurate way to go about that. You really do need to get it and the trailer on some scales.
You do like to get trampled on! We get it, you're proud of your Expedition or trying to justify it. Either way just do whatever traffic you're around with that combo a favor, stay to the right, keep her about 50 or 55, maintain tons of distance.