Fifthwheel towing

[JimmyfromSF]

Are those tire loud? I was considering them because of the places I go at times. But they would probably just fill with mud also.

They are surprisingly quiet.

 

[Foxy577]

What size tires?

B

35-12.50R20

 

[H3LZSN1P3R]

What tires would you recommend instead of the Toyos?

Cooper stt pro if you want an aggressive tire or the good year duratrac or if you want an A/T tire id get the cooper at3 ltx (thats what i am running right now its great tire) general grabber at2 is a nice tire too

 

[kobra]

35-12.50R20

Ok, so you do have a high enough load rating for what you are trying to tow. And, 80psi is the correct pressure when loaded.
But, I shouldn't assume here... are they the Toyo AT3? Or RT?


B

 

[H3LZSN1P3R]

35-12.50R20

Ok, so you do have a high enough load rating for what you are trying to tow. And, 80psi is the correct pressure when loaded.
But, I shouldn't assume here... are they the Toyo AT3? Or RT?


B

80 is far to much pressure unless it was at max load 7-8000lbs on the rear axle......and the bigger the tire the less psi required

 

[Lary0071]

Cooper stt pro if you want an aggressive tire or the good year duratrac or if you want an A/T tire id get the cooper at3 ltx (thats what i am running right now its great tire) general grabber at2 is a nice tire too

I run the STT Pro in 37x13.5-18 on a JK Wrangler and while it's an amazing tire for rock crawling and general offroad use, it wears really really super fast compared a Copper AT3 or BF Goodrich AT KO2.

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[H3LZSN1P3R]

I run the STT Pro in 37x13.5-18 on a JK Wrangler and while it's an amazing tire for rock crawling and general offroad use, it wears really really super fast compared a Copper AT3 or BF Goodrich AT KO2.

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I ran stt pros they wear great and lasted pretty good for me with my 05 cummins i got about 80k km on them your 37s are most likely 6 plys vs the 10 plys i ran....

 

[Lary0071]

I ran stt pros they wear great and lasted pretty good for me with my 05 cummins i got about 80k km on them your 37s are most likely 6 plys vs the 10 plys i ran....

Do you think that the carcass plies effect the rubber compound?
Do you think a 6 ply on a 4,800 lb vehicle is similar to a 10 ply in a 8,000 vehicle as far as carcass flex and deflection?

Just asking for a friend.

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[H3LZSN1P3R]

Do you think that the carcass plies effect the rubber compound?
Do you think a 6 ply on a 4,800 lb vehicle is similar to a 10 ply in a 8,000 vehicle as far as carcass flex and deflection?

Just asking for a friend.

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No but a 6ply tire usually has less tread depth than a 10 ply tire if you go check the specs you can see that is a very common theme also some companys will run different rubber compounds on different load rated tires

 

[Lary0071]

No but a 6ply tire usually has less tread depth than a 10 ply tire if you go check the specs you can see that is a very common theme also some companys will run different rubber compounds on different load rated tires

They are 22/32 new. I happen to keep a new one on the carrier and replace 2 every other year. I don't drive many miles, 35,000 miles in 8 years. I bought this new in spring of 2014 when the Willys Wheeler Special Edition first came out in the JK series.

I highly doubt your tires had more depth than mine as new.

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[JimmyfromSF]

Ok, so you do have a high enough load rating for what you are trying to tow. And, 80psi is the correct pressure when loaded.
But, I shouldn't assume here... are they the Toyo AT3? Or RT?


B

They are the Toyot R/T. 35x12.5 R20LT 125Q. 12 P.R.

 

[JimmyfromSF]

May try a Hellwig Bigwig sway bar..they are around $400~$500 if memory serves me.

I just installed a new big wig sway bar. It’s feels good but the real test will be this Friday when I pull the trailer from Fresno to Vegas and then to Springdale, Utah.

 

[H3LZSN1P3R]

They are 22/32 new. I happen to keep a new one on the carrier and replace 2 every other year. I don't drive many miles, 35,000 miles in 8 years. I bought this new in spring of 2014 when the Willys Wheeler Special Edition first came out in the JK series.

I highly doubt your tires had more depth than mine as new.

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i dont know if mine had more tread than a 37” but like i said usually 6vs 10 ply the 10 ply has more....i just know they lasted a long time 80,000km or about 50k miles for an aggressive tire thats a long time

 

[Foxy577]

Ok, so you do have a high enough load rating for what you are trying to tow. And, 80psi is the correct pressure when loaded.
But, I shouldn't assume here... are they the Toyo AT3? Or RT?


B

A/T II Open County

 

[Foxy577]

Jesus drop them tires to 60 or so and i found toyos sucked with a trailer on

This is a coil spring truck no air bags and it does it loaded with fire wood or the trailer.

 

[H3LZSN1P3R]

This is a coil spring truck no air bags and it does it loaded with fire wood or the trailer.

No one said you had airbags..... side note i had the toyo at2 it was awful for towing or anything really

 

[kobra]

80 is far to much pressure unless it was at max load 7-8000lbs on the rear axle......and the bigger the tire the less psi required

Nope, the above is just wrong, and dangerous advice.
https://www.toyotires.com/media/3729/application_of_load_inflation_tables_20200723.pdf
Page 32... 80psi is required to carry the rated load of 3640lbs on that size tire.
Which matches the OEM tires ratings, and which allows for max rating when towing.
And, the RAWR doesn't even go to 7-8000lbs on that truck.

But a 12k 5th wheel will max that rear axle, which I think is 6500lbs. I should know, I towed about 30,000 miles with a similar weight 5th wheel on a 2016 2500.

B

 

[kobra]

They are the Toyot R/T. 35x12.5 R20LT 125Q. 12 P.R.

I haven't used the R/T's for towing. I have lots of friends who have run them and some who tow. But I can't think of anyone who is towing that heavy with them.
They are great tires overall, but definitely lean more towards off road.
Despite the wrong advice here to not run them at 80psi, you need to run them at 80psi in the rear tires when towing. Have you tried that?

B

 

[JimmyfromSF]

I haven't used the R/T's for towing. I have lots of friends who have run them and some who tow. But I can't think of anyone who is towing that heavy with them.
They are great tires overall, but definitely lean more towards off road.
Despite the wrong advice here to not run them at 80psi, you need to run them at 80psi in the rear tires when towing. Have you tried that?

B

Yes I put 80psi in the rear and installed the upgraded sway bar yesterday. Friday I am hauling the trailer so we will see how much of a difference that made on the swaying. I got my fingers crossed

 

[kobra]

Yes I put 80psi in the rear and installed the upgraded sway bar yesterday. Friday I am hauling the trailer so we will see how much of a difference that made on the swaying. I got my fingers crossed

I'll be interested to see how much of a difference that makes.
My experience was that overall the 2500 worked great; until it didn't. In my case, sidewinds didn't bother too much. It was if I was on rutted pavement secondary roads. It seemed like the trailer could get out of phase with the truck and then things would sway. That might have been once or twice a year though.
BTW, I had the OEM Firestones then I had Michelin LTX... while the Michelins were quieter, I didn't think they changed the towing experience much. But both tires are much more highway biased than your R/Ts.

So, I'm still not sure what's causing your issues... I still suspect it might be the tires. Floatation size, more off road bias?
Again, be interesting to see much how the sway bar helps.

B