There is one member here that put 6 HMMWV rims on his Dodge Dually. He has a friend make spacers that mount the rear rims face to face. They actually look very cool. He's running the HMMWV 37s on the Dodge. It's pretty durable too, its his work truck.
Other option is widening rims, there is a bone yard up here with several 16.5 dually rims.
Long Wheel is the company you are trying to recall. The guy I'm referring to has all HMMWV 12 bolt rims with a well engineered adapter that allows them to be installed face to face. I need to see if I can find him and get some pics. He's a member here but I don't recall him ever posting.
That's good to know. I was considering something like that but wasn't sure if it would work since I don't have a set of HMMWV wheels nearby to look at. As for the spacers in the rear, I can understand the need for them to mount the wheels face to face (spacer would actually sit slightly inside each wheel on the rear)...but I wonder if he also had to add 2" to the spacers or if he had them set up so the wheels basically sit flush against each other with the spacer only being there to allow the wheels to be torqued down. Does that make sense?
There are only two reasons I can think of, logically, that would require the extra 2" gap between the rear duals. (1) Just like trying to put 395's on my M211, the rear tires are close enough to rub each other, so the rear duals have to either be spaced far enough apart to keep them from rubbing or the rear wheels have to be custom machined to give the same effect. And (2) Duallies are notorious for getting mud packed in between the rear duals causing a loss of traction offroad, spacing out between the rear duals "might" help out with that. There is a third option, but it serves as more of an eye-pleaser than for a functional purpose... wider is better and just looks cool (to an extent).
For the front just find a DRW Dana 60 and use the original DRW hubs - no spacer needed.
This was something else I was curious of. I know the SRW trucks need spacers because (and please correct me if I am wrong) the HMMWV wheels have a 7" offset and typically, a centered wheel will fit just about anything, so a 2.25" - 3.5" spacer would be needed to fit HMMWV wheels on a SRW truck. But on a DRW truck, there is already a factory "spacer" on the front axle that allows for the bud style factory wheels to bolt up in the front (allowing the carrying of just one spare instead of a spare front wheel and a spare rear), and the rear hubs already widen the mounting surfaces for the same purpose.
But on the rear, the DRW hubs only add about 2.25" more clearance than the SRW on each side (72" from mounting surface to mounting surface for DRW vs. 67.5" on SRW - Corp. 14b). Without pulling my rear duals, I am curious if the 4.75" (HMMWV offset of 7" minus the 2.25" extra width) is enough clearance on the rear? I know you can run 10" wide centered wheels on a SRW without issue, leaving you with 5" of wheel to the inside of the mounting flange, so adding an extra 2.25" to the width should allow for up to a 7.25" backspace on the inside rear dual before spacing is needed... so I guess this really boils down to, am I correct on the backspacing of the HMMWV wheel, and is the back spacing the same for the 8, 12, and 24 bolt versions?
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I like the idea of running stock, unmodified HMMWV wheels all around. This would allow me to carry just on spare, they would fit the 37x12.50R16.5 tires, the HMMWV style would be there to complement the Urban Gorilla body, and if I bend up a wheel or otherwise damage it at some point, I would just have to come up with another HMMWV wheel to mount up instead of having to have another custom wheel made (which beyond the price issue, leaves me depending on the company that makes the first set still being around if I have to have another one made because I do something stupid...which I will, Murphy seems to like me). I am really interested in knowing more about the spacers for between the rear duals, and knowing how a HMMWV wheel looks on the "back side," I assume it looks a whole lot like the front side, but I have never paid that much attention to the backside in the past. I wonder if any machining had to be done around the lug nut flanges on the HMMWV wheels to allow for the spacer to sit flush.
And thanks for all the prompt replies here! I guess searching for the right thread really does pay off here, even if the right thread only has one post that's 3 years old when you find it!
EDIT: I found this thread on the HMMWV wheels/tires. Seems to have good information in it regarding some of my above questions and some of the above answers.
http://www.steelsoldiers.com/showthread.php?37371-The-411-h1-hummer-wheels-tires