towing at maximum CGVW

I'm kinda new to Tundras.com...I have a 2014 Tundra Limited and have a Forest River Shockwave Toy Haul with GVW of 10,500 and very worried about how the Tundra will handle pulling because I know I am maxed out on the gross combined weight which is I think 16,000 lbs. So here is what I have learned:
When I bought the trailer, I haul a HD TriGlide...1,200 lbs, my first few trips,around Yuma AZ...and to Benson AZ...I knew the Tundra was towing at MAX, could not use cruise control, max speed was about 60 mph, climbing to 4,500 ft at about 40-45 mph at 2500 rpm's and got 7.2 mpg. I was very concerned for several reasons:
I leave Yuma for the NW and travel up the Rockies for a month to WA...climbing through passes from 5-7 thousand feet - then return to Yuma in October.
SO, I did not want to trade in for a three quarter ton rig and researched what I could add on the Tundra that would make the towing safer and here is what I added:
Firestone Air Bags
TDR Rear Sway Bar
AND after much deliberation bit the bullet and installed TDR Cold Intake and TDR Cat Back Dual Exhaust.
Results:
I could pull grades of 5-7 percent at 35-45 mph at 2500-2700 RPM's
Still could not use Cruise Control - not a problem
On descending down mountains I had to start at 35 mph and use the trailer brakes and take my time...not a problem
MPG increased from 7+ to 10+ MPG and that is significant as the Tundra only has a 26 fuel capacity so I stop every couple of hours...need a stretch anyway.
But the big news is my MPG increased from 12-13 mpg to 17-18 mpg when not towing.
Hope you all find this useful info.

 

You need a weight distribution hitch...

 

If you are getting 10+mpg towing that size of trailer......something with my tundra ain't right. 4k loaded to the brim and I think I get around 9mpg on a flat road

 

shock wave 27 RQDX

 

Colorado TJ,
Thank you for the Spec's....so here is how I keep the CGVR to or close to 16000 lbs:
My HD weighs 1200 Lbs and when loaded reduces the tongue weight to 750 lbs and have no problem being over weight.
When traveling with the HD loaded I only travel with enough water to get me from A to B using 10-20 gallons of water till I get to shore water.
I have a 35 gallon fuel tank but only fill 5-10 gallons for generator use...I never use that fuel for my HD.
AND most if my extended trips are by myself as they are HD riding trips...therefore minimum clothing and stuff.
When traveling on interstates regardless of the posted speed limit I travel at 55-60 mph in the slow lane I am never in a hurry,
On non interstate roads usually to my final destinations I travel at 50-55 mph and use turn outs for slow vehicles.
On my return from Yuma AZ to the NW, the Olympic Peninsula in WA...I traveled 1500 + miles in elevations from 4000 to 7500 feet for four weeks and did not get under 500 feet till I got to I-5 in Oregon.
When I got to Port Ludlow, home for the summer...I padded the Tundra Hood and said, "That-a-Boy."
JT

 

I went to the dealer, Little Dealer Little Prices, in Phoenix AZ...with my HD and a tongue scale and weighed the trailer tongue empty, 1125 lbs...then loaded my HD..tongue weight 750 lbs...then bought the trailer.
By the way what part of Colorado....one of my favorite states to travel and ride.
JT

 

TJ, doesn't the j2807 spec account for two 150# passengers, full fuel tank, 70lbs WDH, and for conventional trailer towing that 10 percent of the trailer weight is on the tongue -- the payload number is then derived after accounting for those factors? Or am I misinterpreting something.

 

Well I was reading what you said about calculating his weight and passenger etc. I thought the first 300lbs was already included in the payload budget.

 

Right so if you pack 2 big ol fat ladies in the truck, you're probably going to eat into your available payload number. On my 2018 SR5 Crewmax 4x4 TRD after yellow sticker on door I'm at about 1220 available payload. Since I weigh about 175 I have a little budget left per the j2807...oh but wait. There's the 70lbs of subs/amp, 50lb running boards I added, etc. etc... all counts against that 1220 payload.

 

This is 'Merica', they need to up the weight to 300 for each occupant.

 

So you don't eat into the 1220 until you exceed 370 lbs of passengers, hitch, etc. correct? Seems to me the true way to check payload is to get your curb weight on a cat scale and subtract that from 7200. Regardless of what j2807 says, you cannot exceed 7200 lbs and once you do you are overloaded right? The only way to increase the payload is to decrease weight of the tow vehicle. Dump the running boards, leave the tailgate at home, put the spare in the travel trailer, etc. if you want to get drastic.

 

Ok, I think the confusion comes with j2807 and payload numbers. I believe j2807 is used to calculate max trailer weight ratings but not the max payload rating of the tow vehicle. My truck at the cat is 6210 with me (225 lbs) in it and the number after add ons (yellow sticker) on my door jamb is 1200 so my guess is that Toyota weighs the truck after any add ons (i have a tss with spray in bed liner, 20 in wheels/ko2s, nerf bars, under carriage plate) and subtracts that from 7200 to get each trucks max payload. If I figured in the 370lbs buffer from j2807 the numbers would be off and I would be well over 7200 GVWR.

 

Yeah shit I just weighed mine too and I'm at 6340 with me in the truck. That's some paltry payload capacity.

 

I’m trying to figure out what sr5 5.7 crewmax 4x4 has a curb weight of 5640???