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Jim....... That will be a very nice rig for your Camper !!
The front Moose Guard is GREAT !!
Thanks Roy! I thought that front "Moose - Grizzly" Guard would come in really handy considering Oregon's new 24/7 365 day a year hunting season just took effect....
I just put 20s on my 2019 F350 dually with Nitto Ridge grapplers F rated 35x12.50 R20 & Fuel Cleaver rims. The factory rim design spacing in the rear is great. Full 2" between the rear tires. Problem is the total width is 104" Dot is supposed to be 102". Has anyone ran 12.50s on the inner and 11.50s on the outside? This would bring me inside of Dot regulations. Question is there a downside of running two different widths on the rear?
Two different widths of oversized tires, bare and undisguised by any mudflaps, will look.... let's just leave it at "different".
Nice that you are conscious of the spacing between tires within dually pairs, and that you are conscientious about DOT overall width limits. Not everyone who does this sort of thing seems to be as aware as you are.
Unmentioned in your post, however, are the rocks and stones the Nittos will grapple and hurl up into the windshields of surrounding motorists due the tires sticking out beyond the coverage of the rear fenderettes.
Changing the outside dual tires to 11.50's will not be enough to fix that liability, as the Ford OEM dually fenderettes are 96". 104" - 96" = 8" that need to be tucked out of the way. 11.50's will only reduce the outside width 1/2" per side, since the 1" difference is split to either side of the wheel center. So instead of 4" stick out past the fender per side, you might be down to 3.5" stick out per side.... not a whole lot of improvement, for what I imagine is another $700 cash outlay. And you'll still be over 102"... but that won't be what the average street and highway cop notices. Rather, your set up just begs to be pulled over and cited by any LEO whose had his own windshield starburst by some other wannabe BigFoot without fender flares.
That is the downside. Tickets. Even if you don't care what your tires fling up onto surrounding motorists sharing the road.
What size tires are on your steer axle?
With dually's, there is a very distinct advantage to having all six tires be able to physically fit, articulate, and steer in all six wheel positions. Especially if running a tire too big to fit in the spare tire rack under the truck. Unless you don't mind carrying a spare in the bed all the time, being able to swap tires and wheels around in the event of a flat or blowout is a distinct advantage that DRW's have over SRWs, since it is possible to run a single tire in the rear to get back home. This actually means that when unloaded, a DRW truck can make it home even after suffering not just one but two flats, even while still not carrying a spare.
That could be a downside with your set up, depending on how wide of a tire will fit the steer axle.
Two different widths of oversized tires, bare and undisguised by any mudflaps, will look.... let's just leave it at "different".
Nice that you are conscious of the spacing between tires within dually pairs, and that you are conscientious about DOT overall width limits. Not everyone who does this sort of thing seems to be as aware as you are.
Unmentioned in your post, however, are the rocks and stones the Nittos will grapple and hurl up into the windshields of surrounding motorists due the tires sticking out beyond the coverage of the rear fenderettes.
Changing the outside dual tires to 11.50's will not be enough to fix that liability, as the Ford OEM dually fenderettes are 96". 104" - 96" = 8" that need to be tucked out of the way. 11.50's will only reduce the outside width 1/2" per side, since the 1" difference is split to either side of the wheel center. So instead of 4" stick out past the fender per side, you might be down to 3.5" stick out per side.... not a whole lot of improvement, for what I imagine is another $700 cash outlay. And you'll still be over 102"... but that won't be what the average street and highway cop notices. Rather, your set up just begs to be pulled over and cited by any LEO whose had his own windshield starburst by some other wannabe BigFoot without fender flares.
That is the downside. Tickets. Even if you don't care what your tires fling up onto surrounding motorists sharing the road.
What size tires are on your steer axle?
With dually's, there is a very distinct advantage to having all six tires be able to physically fit, articulate, and steer in all six wheel positions. Especially if running a tire too big to fit in the spare tire rack under the truck. Unless you don't mind carrying a spare in the bed all the time, being able to swap tires and wheels around in the event of a flat or blowout is a distinct advantage that DRW's have over SRWs, since it is possible to run a single tire in the rear to get back home. This actually means that when unloaded, a DRW truck can make it home even after suffering not just one but two flats, even while still not carrying a spare.
That could be a downside with your set up, depending on how wide of a tire will fit the steer axle.
Thanks for the information! I am adding mud flaps to the rear so hopefully that'll help out from debris being thrown. The front just like all the other tires are 35x12.50R20. From what I calculate 11.50 nittos are 11.44 and the ones that I have the 12.50 are 12.52 so I'll be saving a little more than 2 inches which would bring me current with Dot regulations. I just wasnt sure if it would mess with the differential or axle in a negative way. I appreciate your detailed reply!
You might want to check your state laws to see exactly what it is going to take to keep you from getting a ticket....and on the civil side, that will keep you from possibly loosing your insurance and being sued.
In my state you are required to have fenders and mud flaps capable of covering the entire width of the tire from a point top center of the tire back to within 24" of the ground...just for starters.
From what I calculate 11.50 nittos are 11.44 and the ones that I have the 12.50 are 12.52 so I'll be saving a little more than 2 inches which would bring me current with Dot regulations.. I appreciate your detailed reply!
You may have missed one of my points. There is a big difference between the proposed 11.50 tires being an inch (nominally) narrower than 12.50 tires, versus what the net change in track width will be after having mounted the proposed tires.
You're only changing tires right? You are keeping the same wheels that the 12.50's are mounted to, right?
Then you will not see the two inch reduction in track width you think you will get by changing the two outer 12.50 tires to two 11.50 tires that are each 1" narrower. Individual tire width is not the same as gross track width.
As stated before, a tire that is 1" narrower will be only 1/2" narrower on either side, as tires do not have offset sidewalls. The 1" difference will be evenly split to either side of wheel centerline. You are confusing individual tire width reduction with track width reduction. You should only be concerned with the outboard side of the individual outer dually tires, not the inboard side, because you already said you have adequate dually clearance in-between tires within a pair is adequate with 12.50s. The only reason why you want to switch the outboard duals to 11.50 is to reduce track width within nationwide legal limits. So the only side of each individual tire that counts is the outside.
Reality Math: 1/2" tire width reduction on the outboard side of wheel centerline + 1/2" tire width reduction on the outboard side of wheel centerline = 1" net reduction in track width; 104" - 1" = 103"; 103" = Illegal, ticketable, liable for any consequential damage to others as a negligent operator.
We will be in the Littleton area this September.........
Yeah, we received a decent amount of snowfall this past winter when that shot was taken. I love snow, the more the better.
Littleton is nice. I'm a little ways south, right on the VT border. However, looks like during that month at least for a couple of weeks I'm taking vacation in Maine. Hopefully the foliage is nice for you.
How do you like the newer dually? I see you went 4x2 to 4x4 now?
It's great! Love all the tech it has. Went from a platinum to a lariat and other than the leather, the lariat is nicer. Miss the fuel economy of the '14. The 4x4 is very thirsty
I think it's not just the 4x4...the 2017+ engines are thirstier in general. My 2017 Lariat Ultimate 4x4 dually got worse fuel economy than my previous gen 6.7L did as well. Axle ratio...did it change for your new truck? Like maybe your old one had a 3.73 which isn't offered anymore, and perhaps the new truck has a 4.10 axle? My 2017 dually, which I ordered, had the more rare 3.55 axle.
Yes. It has the 4.10 gears. Old truck had 3.73. I realize the extra HP and torque come with a price on fuel economy but I hoped it wasn't going to be this thirsty. I'm getting about 30% less overall combined MPG than previous truck. Towing mpg is almost the same, just a slight decrease
It's great! Love all the tech it has. Went from a platinum to a lariat and other than the leather, the lariat is nicer. Miss the fuel economy of the '14. The 4x4 is very thirsty
Double check that the front manual hubs are unlocked....... When I picked up my current dually, the front hubs were locked.
