2019 F350 6.2L 4WD build thread; HPI flatbed, ATO AterraXL composite camper, Carli/King, 37s, 4.88s, etc

[mk216v]

Looking good skinhy thx!!

I would say Maxxis as in theory they would provide a bit better traction in inclement weather you may come across when not running your dedicated winters.

That is a good point, although we don't expect to come across winter weather when aren't equipped with the Blizzak's (we'll have Blizzak's on from Oct to March/maybeApril). Of course anything can happen, but it'd be rare, and airing down whatever tires we have could help with traction a tad more.

Hmmm... Thats going to give you about 7k load rating at the rear axle.
And with my estimated GVWR of 13k+, i think you are going to be cutting it pretty close sir.
Do I dare ask why you aren’t even considering load range E tires? That’s almost standard minimum on most camper setups.
Love You [Kissy Face]

Seems you haven't done your research dear sir. Find me an all-terrain 37x12.5R17 tire that's E-load. Ain't none! They're mainly all D; https://tiresize.com/tiresizes/37X12.50R17.htm

And I'll eat my hat if my RAW is 7k, as the camper is 1250lbs wet, flatbed/boxes is ~900lbs unladen(already calculated in RAW below).
Latest weigh-in on 1/6/22 was; 8550lbs w/ Buckstop bumper/winch/Baja lights, full 60gal tank, HPI crossframe/flatbed bare, gears/locker in boxes in rear seat area(so maybe 125lbs that won't be there again), some smaller Carli susp boxes in crossframe, me and dogs on platform (4900F/3650R).
3650lbs R - 125lbs for secondary gears/locker + 1250lbs for camper + stuff in underbed boxes + upgraded leaf springs + heavier wheels/tires + rear winch when needed + 4 Maxtrax and 90lbs of water jerries = ~5400lbs Rear?

 

[RAM5500 CAMPERTHING]

Seems you haven't done your research dear sir. Find me an all-terrain 37x12.5R17 tire that's E-load. Ain't none! They're mainly all D; https://tiresize.com/tiresizes/37X12.50R17.htm

So you're choosing your tize and wheel size based on aesthetics instead of load rating? Got it. Nevermind. ?

Cmon man, Even FWC (for whatever their opinion is worth) suggest a E rated tire for use with their campers.

Have you discussed this with Mr Mario?

 

[Skinhyfish]

So you're choosing your tize and wheel size based on aesthetics instead of load rating? Got it. Nevermind. ?

Cmon man, Even FWC (for whatever their opinion is worth) suggest a E rated tire for use with their campers.

Have you discussed this with Mr Mario?

you went with the single wheel conversion. You are on contentals? What’s the life expectancy on those. Always been curious. They wear fast?

 

[RAM5500 CAMPERTHING]

you went with the single wheel conversion. You are on contentals? What’s the life expectancy on those. Always been curious. They wear fast?

Yes sir. I went with the Continentals for the load rating.

As proud as I am of meticulous planning and execution, the choice of the Continentals was an epic fail and I absolutely hate them and the noise.

At the time they were really the only somewhat easily available option.

Now, Buckstop and a few others stock the Goodyear variant, which is supposedly a lot better/quieter. But I’ve also heard some folks hate them. Sooooo

A friend of mine has a similar rig with the Goodyears that I am going to drive and if they are in fact that much better, I am swapping over. A costly screwup one my part. ??‍♂️

As for longevity, I’m not sure and here mixed things.

I only have about 7k on mine and although I haven’t measured them, they don’t look very worn at all.

I’ve heard Earthroamer owners saying they average 25-30k on a set and I’ve heard other folks saying 50-60k. So time will tell.. if I keep them that long ?

Honestly, if the Goodyears aren’t much quieter, I’m likely going back to Dually when I wear out this set of Contis

 

[mk216v]

So you're choosing your tize and wheel size based on aesthetics instead of load rating? Got it. Nevermind. ?

Cmon man, Even FWC (for whatever their opinion is worth) suggest a E rated tire for use with their campers.

Have you discussed this with Mr Mario?

I went with the Continentals for the load rating.
As proud as I am of meticulous planning and execution, the choice of the Continentals was an epic fail and I absolutely hate them and the noise.
At the time they were really the only somewhat easily available option.
Honestly, if the Goodyears aren’t much quieter, I’m likely going back to Dually when I wear out this set of Contis

Yep, cause I've done the math.
Peter has been running 37" D's (3525lbs/ea @50psi max) for awhile now, with a truck camper setup heavier than mine, no issues; https://expeditionportal.com/forum/...-on-37s-expedition-truck-camper-build.216282/

Haven't discussed with Mario, as he is running 40" Toyo MT's, and they're....gasp....C load! (3195lbs/ea @35psi max)! https://tiresize.com/tires/Toyo/Open-Country-MT-40X13.50R17.htm

Yeah, I'm perplexed too as to why tire mfr's aren't making E loads in 37", D or E load in 40". I asked that of Scott Brady here, but no answer;

https://expeditionportal.com/forum/threads/announcing-the-overland-journal-podcast.212065/page-3#post-2843853

37s Load D or E?

I have a single wheel, ram 3500, with a 2,500 wet weight hallmark pop up and would like to go with 37 inch tires (already have leveling kit). Very Windy Wyoming paved roads (gusty winds so stability is always good) and miles and miles of forest service roads with washboard (more cushion can be...

expeditionportal.com

I'd like to learn more and/or see a white paper. Can anyone else shed light on this?

The lack of E load's in larger diameter tires, and the increase in vehicle weight = the bigger rigs like ER's and GXV's are all running MPT81's or G275 MSA's (besides the beefy look from the Hutchinson beadlocks).

MPT81

www.continental-tires.com

275/80/20 is 37.3"dia, 134 LI(load index) = 4674lbs/ea.
335/80/20 is 41.1" dia, 147 LI is 6779lbs/ea.
365/80/20 is 42.8" dia, 152 LI is 7826lbs/ea. Jeez that's a lot of weight....

Your MPT81's; are you sure you didn't get stuck in the Overland Marketing Machine, or the Instagramtastic Poseur Programmer?
Back to DRW on your RAM; but what about turtleheads getting stuck between your rear tires and blowing out a tire??

 

[Tex68w]

You can get a good E load 37 by moving to a 18" wheel.

 

[RAM5500 CAMPERTHING]

You can get a good E load 37 by moving to a 18" wheel.

Exactly.. But but but…. METHODS BRUH! They’re sick! ?

Real talk… have the 17” wheels been test fit on the truck yet? I’m kinda surprised they’d clear the brakes. Helped a buddy do his brakes on his 350 and was surprised how huge the calipers were.

 

[RAM5500 CAMPERTHING]

Haven't discussed with Mario, as he is running 40" Toyo MT's, and they're....gasp....C load! (3195lbs/ea @35psi max)! https://tiresize.com/tires/Toyo/Open-Country-MT-40X13.50R17.htm

That’s odd. Even bone stock, with the Cummins, his front end is basically at the limit.

I just checked my cat scale tag when I weighed it bone stock before camper. 6250lbs on front axle

Soooooo, all those AEV Prospector XLs with the Cummins are basically at their load limit on their front axle…. Interesting.. I had no idea those tires were rated so low for payload

 

[Tex68w]

Exactly.. But but but…. METHODS BRUH! They’re sick! ?

Real talk… have the 17” wheels been test fit on the truck yet? I’m kinda surprised they’d clear the brakes. Helped a buddy do his brakes on his 350 and was surprised how huge the calipers were.

17's fit the 2500/3500, not sure if the 4500+ get a bigger disc and caliper?!

 

[RAM5500 CAMPERTHING]

17's fit the 2500/3500, not sure if the 4500+ get a bigger disc and caliper?!

Most definitely. My stock 19.5s barely cleared the calipers.

My buddies stock calipers on his F350 were impressively huge. Probably twice the size of the Tundra

 

[tacollie]

Exactly.. But but but…. METHODS BRUH! They’re sick! ?

Real talk… have the 17” wheels been test fit on the truck yet? I’m kinda surprised they’d clear the brakes. Helped a buddy do his brakes on his 350 and was surprised how huge the calipers were.

There's 2 or 3 17" rims that will work as long as the tire shop doesn't try to stick weights in the wrong places?

 

[Frosty_1]

Nice build. I have the Falkens and think they are a decent tire. I'm in Bend as well. Similar truck, F250 6.2 gasser with full Carli kit.

Did you have a shop in Bend install the gears? I'll send ya a PM as well...

 

[mk216v]

You can get a good E load 37 by moving to a 18" wheel.

Yes, E load tire is more available in an 18", however....
--there are some E loads with a 3195lbs/ea @ 65psi rating, not the higher/typical 3970lbs/ea @ 65psi rating for an E.
--not so much available in an A/T in 37x12.5x18. M/T's in that size, yes; https://tiresize.com/tiresizes/37X12.50R18.htm
--more A/T's available in 13.5"W, however I'm not keen on running an 0.8" overall wider Yoko tire, as Carli says 12.5" is the correct fit for their susp(below); https://tiresize.com/tiresizes/37X13.50R18.htm

(https://carlisuspension.com/product...-suspension-systems-gas/17-gas-pintop-system/);
On our 2.5” Ford Systems, we recommend 17”-18” wheels, no more than 9” wide with 5.5” of backspacing with Carli Fabricated Radius Arms, or 5” Backspace with factory arms; 5” will require a bit more trimming. Tires, 37×12.5” will fit with some trimming.
18x9”
BS/Offset; 5.5"/+12.7mm; Don’t exceed the +12mm offset or you’ll scrub the arm itself.
BS/Offset 5.75"/+19mm; No, will hit the Carli radius arm (as wheel is sucked more inboard).
BS/Offset 5"/0mm; You’ll likely be trimming pinch weld.
17x8.5”
BS/Offset 4.75"/0mm; Ok, it will fit similar to the 9” wide with a 0mm offset. 0mm offset = pinch weld trimming.


37x12.5x17 have 10"H sidewall, x18 has 9.5"H sidewall, x20 has 8.5"Sidewall.
Seems the tire mfr's skipped over the 18" tire options for some reason <cry>, and went straight to 20" wheels. Baller.

Exactly.. But but but…. METHODS BRUH! They’re sick! ?

Real talk… have the 17” wheels been test fit on the truck yet? I’m kinda surprised they’d clear the brakes. Helped a buddy do his brakes on his 350 and was surprised/impressed with how huge the calipers were. Probably twice the size of the Tundra

Soooooo, all those AEV Prospector XLs with the Cummins are basically at their load limit on their front axle…. Interesting.. I had no idea those tires were rated so low for payload.

Method's are higher quality than Black Rhino in my experience, or American Racing, or other big brands. Sure, I could go 18x9 +12mm offset, more-premier Innov8 forged smooth/non-beadlock (https://www.innov8racing.com/product-page/g600-18x9-smooth-lip-nonbeadlock-wheel), at 2.5x the price of Method's, but 3600lb/ea load rating for Innov8 vs 3640lbs/ea for Method's, Method's at 6.2lbs/ea lighter, and some feedback thus far is that the BeadGrip on the Method's works well. And I won't be banging these wheels up on enough rocks to justify a forged wheel vs cast wheel.
17" wheels on the F350 are a factory option, so they clear the brakes. Less payload rating from Ford with 17" wheels vs their 18" wheels.
I didn't know the 40x12.5x17s were a C load either.

Nice build. I have the Falkens and think they are a decent tire. I'm in Bend as well. Similar truck, F250 6.2 gasser with full Carli kit.
Did you have a shop in Bend install the gears? I'll send ya a PM as well...

Thanks much, and for your feedback. Looking forward to seeing your truck.
Not in Central Oregon, headed towards Portland--will PM you.


My next step is to have a look at the Yoko Geolandar X-AT weight spec at X air pressure, as @eyemgh mentions here; https://expeditionportal.com/forum/threads/37s-load-d-or-e.220996/page-3#post-3002317

Ideally I'd already know my finalized front axle, and rear axle weights, but camper isn't finished and thus my 4 under-bed boxes aren't on and loaded. But I can use a guesstimate of front and rear axle weights, and use that for the tire mfr "matrix" sheet to see what they list for X lbs spec at X psi.

 

[mk216v]

More tire nerding out here, regarding 37x12.5x17 D load vs 37x13.5x17 E load vs 37x12.5x18 E load (it may open your eyes as it did mine!);

37s Load D or E?

Thanks for the info above, all. Also, MANY thanks to @klahanie for reminding me where the tire inflation "matrix" tables were located on the web. They can be found here; https://www.toyotires.com/tires-101/tire-load-and-inflation-tables/...

expeditionportal.com

 

[mk216v]

Update on tires;
37x12.5x17 (D load) is preferred, but I really need the camper and 4 under-bed boxes(filled) on, get true axle weights, add some extra fudge-weight in on the front and rear for what's hanging past the axle, including trailer tongue weight (see info about that here; https://expeditionportal.com/forum/threads/37s-load-d-or-e.220996/page-4#post-3003836). Then compare to the load/psi table that Toyo has on their site (an industry standard guide).

Unfortunately what the guide doesn't have is data on the 37x13.5x18 (E load) tire--it must be too new to have been included in the Toyo table. This would be my alternative to the 37x12.5x17 (D load), if I need more available load (at pressures higher than 50psi, as both the 37x12.5x17 D and 37x13.5x18 D in Toyo's table max out at 3525lbs max at 50psi max. An E load would offer up to 3970lbs max at 65psi max like the 37x12.5x18 does).
If tire mfr's would just make more A/T's in the 37x12.5x18 size, then this would be a whole lot easier and I'd stay with the Carli-recommended 12.5" width. But it seems the industry has skipped 18s and gone to 20s instead.
Which 18" wheels would I go with? Much to @RAM5500 CAMPERTHING 's satisfaction, BlackRhino nor Method have an 18x9" +12mm that Carli recommends. But innov8 does, so I'd go with this wheel; https://www.innov8racing.com/product-page/g600-18x9-smooth-lip-nonbeadlock-wheel

In other news, tinter/vinyl guru is working on adding tint/vinyl/light protection film.
And Carli pintop susp is going on in a few weeks!

For now as winter winds down, I'll switch from the factory steel 18" wheels/33" Blizzak's, and shamefully run on the factory chrome(eek!) 18" wheels with the Ironman A/T's that came on the truck as I still have "free" mileage on those tires. Yes, truck will look goofier with a 2.5" lift, and chrome 33s for now. <shrug>