Tongue Weight Capacity?

Maybe. But he joined yesterday and didn’t seem to agree with the answer he was getting. Pretty sure he would’ve bailed way before my post. I wasn’t as harsh as other posts in this thread.

There are also a lot of people who join, make 1 thread, then are never seen again.

 

He’s busy explaining to his wife why he now needs to buy a bigger truck

 

Entirely possible that you are correct.

 

A few thoughts.

1. What is the dry weight of the trailer and tongue weight? Will you load it to max? You CAN tow 10K but pushing your safety and reliability limits. I'd stick to 7500-8000 as a gross weight for any long distance towing. Knowing dry weight and what you load will vary.

2. Heavier tires and airbags will NOT effect load/carrying capacity. The bags generally sit on the axle, and the tires effect the weight but not carrying/load capacity. It DOES effect the tire load capacity though.

3. A weight distributing hitch will help with tongue weight. The gross trailer weight should be distributed so that the tongue weight is 9% to 11%. You should shoot for a 1000lb tongue weight if you are at you 10K max, and down accordingly based on your load.

4. 40' trailer is WAY to big for a 1/2 ton truck IMO.

 

wow.. thread resurrection

Actually, heavier tires will add to your vehicle's curb weight which will lower your payload.
GVWR - curb weight = payload

 

LOL, it showed up in the 'newest posts' section, or came up as I was doing a search for tongue weight. I never looked at the dates. I guess the OP never circled back.

I get what you are saying, and am by no means an expert, but the tires are not 'on or in' the vehicle, the vehicle is 'on' the tires. I wouldn't give wheel/tire weights a second thought on GVWR. Then again, I rarely pay attention to payload numbers and other than an occasional huge load of mulch or concrete bags that goes way over the stated limit rarely come close. Even then, with 2000+ pounds the truck was fine. I just wouldn't do it every day. The figures are ridiculously low..........

 

Everything attached to the vehicle contributes to curb weight; including tires. A set of larger tires and wheels could add an additional 100 pounds to the curb weight which would lower your payload by 100 pounds.
Think about placing the truck on a scale. The tires will be included in that weight.

 

Meh, I'm not buying it. Curb (total) weight increase from tires? YES...... Payload? I say NO.

You do understand that PAYLOAD is determined by what is carried by the suspension and chassis of the truck right? Think of it this way..... If you can deadlift 500 pounds in normal gym shoes, and then strap on 100 pound shoes, will you now only be able to lift 400 pounds? Of course not. What is on your feet will not effect what you can lift/carry. Same principle on tires......

But hey, YMMV. CIAO!

 

Unless you're the automotive engineer responsible for designing the Tundra, how do you know that its payload is dictated/determined by the suspension? There are a lot of other components at play, including the frame, brakes, cooling system, etc....

 

OK, I'll try to be clear.......... Tires are UNSPRUNG weight and their 'weight' do NOT effect payload...... If anything, a higher load class of a tire (AKA heavier) will help with payload, at least from a safety perspective being able to safely carry whatever weight you have IN the truck. Good points on cooling and brake systems, but again, tires are UNSPRUNG weight, and will not effect payload. YMMV

 

Payload = GVWR - actual weight. Heavier tires increase actual weight. GVWR doesn’t change. So payload is reduced. No other way around it.

In your weightlifting example, the weightlifter isn’t lifting that weight while running 55 mph. Heavier tires plus max payload greatly increase stopping distance. There is more to it than just what your suspension can hold.

 

You're as confident as you are wrong.

 

payload is NOT determined by what is carried by the suspension and chassis.
Payload is a calculation.
payload = GVWR - curb weight.
There is no other way about it.
Curb weight includes everything on or in a vehicle; including the tires and all the suspension. “Unsprung weight” is irrelevant. if you increase the curb weight, then you lower the payload.

edit: you admit that heavier tires increases curb weight. Plug that curb weight into the calculation and see how the payload decreases.

 

Since this tread was just brought back from dead, where was your friend fined? I’m local to Philly.

 

https://www.rvtravel.com/maximum-towing-capacity-smoke-mirrors-1076/

 

Agreed on mine they even have the updated weight reduction by 193lbs for a crewmax even when I had the 4runner before i believe it caps at 5k or 6800 but even if I couldn't I wouldn't go over 4k for the sake of having that safety buffer