Chaos, and the rest,
I too have been toying with HumVee wheels and tires but not for the same reasons that you have been. This is the only thread with actual knowledge (not hearsay) about the ins and outs of 8x6.5" lug center deadlock wheels that I could find anywhere on the internet. Chaos' rig comes the closest to my rig, but I'm hauling a LOT more weight on the rear axle; up to and sometimes over 7000 pounds. I've had some crushed rock loads ring over the rear axle that were over 5000 pounds with no deleterious effect in either going or stopping.
1st, It's a 2001.5 Dodge 2500 4X4 CTD HO NV5600 NV241HD (the one with the wide chain for snow plow work and to abate shock loading)
Front axle: Dana 60 housing, D70 outers and selectable hubs, big bearing, 35 splines all the way across, unit bearing delete, axle disconnect delete, Detroit True Trac gear driven torque biasing limited slip, 3" lift pucks, frame/steering box stiffener, Gen4 track bar, Gen4 tie rod, drag link, and new anti sway bar parts, 6" lift 4 links on a 3" lift locating the front axle 1-1/2" forward of stock location, stock Dodge wheels with 6-1/4" back spacing (as measured to edge of rim, with Mickey Thompson 305x75R16 Mud tires, measured diameter 33.1", 3750 E load rating. Above the front suspension sits a Warn 15K pound winch and a lightweight fabbed up bovine deflector.
Rear axle: Dana 80, true 35 spline (the auto trans/CTD trucks of that year had 31 spine Dana 80's), Power Lok limited slip (with cone shaped wet clutches under high preload), Mickey Thompson 12" wide x 16" super single wheels with at 3600 pound rating, Mickey Thompson 375 x 55 R16 super single tires (16" across) with at 3750 E load rating. Above the axle are 8 leaves on each side: 4 stock main leaves; 3 upper secondary or overload leaves; one helper spring down in the pack which give a better ride when empty. Not that there is anything resembling a car-like ride with 8 leaves per side.
This is all set up for my little hard side Lance Lite 165-s truck camper which we use off-road a lot. Loaded up, the camper adds 2700 pounds directly over the rear axle, hence the need for wider tires and all those springs to support the load, off-road. The loaded rig sits level with the camper on.
I really like the quiet super single wheels/tires for this application and would do it again in a minute except that the tire is no longer being made. The closest thing to a super single (non-military) is a 16"x 14.50 Mud Grappler tire that I"ve had before, but they are SO noisy. Now, why would I want to stick to a 16" wheel/tire? Floatation. I like to run my 10,400 pound white brick on the dunes at low pressure, and have successfully done that for a decade or more. I've had 14, 4WD's over the past 50 years and am used to running at low pressure on sand or deep power snow.
My other predicament is that I never have had a non-headlock tire come off the rim on any of my rigs, over 10's of thousands of low pressure (down to 5 pounds) sandy, rocky, snowy miles so I don't even know why I would need deadlocks except for 'the look' which I'm not interested in. Plus the 16.5" does not have a good non-headlock reputation.
My 15.50's are wearing out and I am in a quandary as what to do. I have been talking to the folks at Stockton Wheel (they've been in business a while) and they can custom make just about any steel wheel you want. What I want is a 16" front wheel; 10" wide; 6.25" backspacing with their flat, 1/2" plate center (to stay out of the way of the tie rod and the disc brake parts). The woe is that they are pretty heavy. This would solve the Dodge problem of rubbing on the back of the front fender well, which I've already abated with the forward location of the axle. The Gen2 era flat top front fender opening did not allow for much clearance in the way of scrub radius, especially at the rear of the opening and wide wheels with a 4.5" backspacing would not allow full steering lock to lock. I have peeled away some of the sheet metal at the front of the front fenders to give it that, "1942 Studebaker 6X6" look. UP to 100K of those went to Russia.
For the rear, since I want to run 4 of the same tires now, the same 'Power Wagon' stockton wheel for the rear except with a 4.5" back spacing and an 11" wide wheel would push the center of the tire out 2.5" farther, which is what I see a lot of off-road RV mfgrs doing now.
I tried to find a 1" spacer that I could use with a stock 12bolt HMV wheel for the front but could find none. As for the HMV rear, I would have to widen the wheel even farther to get the wide platform I'm used to.
There is a plan associated with all this build up. We live in snow country and full lockers like ARB and Detroit are just too iffy on ice. When the time is right we're planning on doing a 16 week; around the lower 48; clockwise; camper tour of the boundary states, leaving on September 1st and arriving back on the west slope northern Sierra Nevada by New Years Day. We'll take in the 'leaf-peeper' season of the northeast; and work our way down the east coast camping ON as many beaches as we can and are open to us. Assatigue anyone? Once a week we'll get a high bucks hotel but mostly campgrounds and stealth camping in cities along the way.
So, a few pics to see where I'm at. Feel free to critique my thoughts and give my your insight.
jefe
a comparo of True tracs for my HP D30 XJ and the Dodge 2500 35 spline D60 front axle:
Overview in Death Valley;
The hump in Goler Wash: This is the obstacle that convinced me to add a front LSD.
305X 16 front tires with Dana 70 free wheeling hub stickout. Tires too wide for stock wheel.
35 spline front outer stub shafts:
8 leaves; those black blocks on the ends are Stable Loads meant to allow the secondaries come into play sooner:
On the dunes with my 14.50's at low pressure (20 pounds). Don't ask what the hell I'm doing pulling a fully inflated jeep trailer along.