1989 M923A2 MRAP Aluminum Wheels.

[grendel]

I didn't know that. Here is my 12" wheel project.

I thought of you the other day, when I found 20"x18" HEMTT wheels on eBay.

 

[tobyS]

I thought of you the other day, when I found 20"x18" HEMTT wheels on eBay.

Wow, that's huge. Those ST tires come on 10" and the tire is 16" wide (I think 18" overall). I'm not sure how they would work with such a large rim. Just for info, here is the nut that fits the aluminum rims and also my nut for the MRAP with 11.25 bolt circle.

 

[tobyS]

I thought most, if not all mrap variants where a bigger bolt circle? Guess thats what I get for thinking....

Yes, most are bigger. They are 13.19" bolt circle and 11" hub pilot. But there are some out there with 11.25 BC like the OP has.

Note the inside of the dish is the side that already has the conical chamfer. I was wondering how he got the mag drill into the dish, but he was working on the flat side (front), so they didn't even need dis-mounted.

The 13.19" is a 20,000-25.000# ag hub pattern...not impossible to match, but not common.

 

[red]

Running the same Caimen MRAP aluminum wheels. Flipped the rear hubs rather than cut the bevel into the back side of the wheels.

 

[tobyS]

Running the same Caimen MRAP aluminum wheels. Flipped the rear hubs rather than cut the bevel into the back side of the wheels.

View attachment 643480

Do you happen to have a rear profile shot of that?

 

[red]

For the width? With the hubs flipped on the rear axles they are as wide as the front.

Sent from my XT1585 using Tapatalk

 

[tobyS]

For the width? With the hubs flipped on the rear axles they are as wide as the front.

Sent from my XT1585 using Tapatalk

Is the track as wide as the duels? If the hub were in and the dish out, would it be as wide, same or wider? My guess is a bit wider. About like my M35A3.

 

[red]

Track width is the same as my front, just as wide as not flipped with the wheel mounted dish out

Sent from my XT1585 using Tapatalk

 

[sawdustnsteel]

I didn't know that. Here is my 12" wheel project.

what type of 12" wheels are you putting on?

 

[Brutus Brent]

There is a nice flat lip to mount a light bar there. Just make sure the light bar is wide enough so when the hood is up you can reach in and drill the holes.

 

[Brutus Brent]

I think you are probably right on the Caiman wheels. The guy I bought them from said they where MRAP.
I have a steel table that I used for the mag drill and also strapped the wheel to the table then strapped the mag drill for some added insurance. Trying to eliminate chatter. I took the run flats out trying to go for a better ride on the road and it does drive nice! I donated the bit to the machine shop I got the mag drill from because I thought I might try and get some more wheels and machine them with a mill and sell them, but working out of town and too many projects that has not happened.

 

[tobyS]

what type of 12" wheels are you putting on?

I'm making a combined wheel from one part, the front ring, that came on the Sand Trail 450 tires and some (I think) Henderson MRAP rims that have the 11.25 bolt circle, steel. There is a slight bit of machining to do for the o-ring, otherwise fit perfect.

 

[sawdustnsteel]

I'm making a combined wheel from one part, the front ring, that came on the Sand Trail 450 tires and some (I think) Henderson MRAP rims that have the 11.25 bolt circle, steel. There is a slight bit of machining to do for the o-ring, otherwise fit perfect.

thanks much, that is brilliant!
hows the highway ride?
( frankly thats what I'm looking for with using Mrap wheels, fatter, bigger tire, polished aluminum for the pimp look and super smooth on road ride. I'm looking at about 85% on road 15% off)

 

[tobyS]

My MRAP's are 10" wide and so are the rims on the Sand Trail tires. Together, they make one 12" and leave a (fire pit) 8". Unfortunately they are still sitting at the machine shop I use for the machining at the o-ring...so not done and tried yet. I wanted to use them on an M51A2 dump truck rear but ended up buying an M929A2, not the M51. I have no idea how "smooth" they will be.

 

[sawdustnsteel]

thank you for the insight.
I was referring to the potential eventual application of said 12" wheel with the understanding you intend to actually apply the wider, more robust wheel to a tire, and the end goal being riding down the road distributing weight via the larger wheel/tire combo. the encouragement was effort to see a report of the ability of a 12" WHEEL used in conjunction with your chosen tire to produce a better overall mechanics. thus if they ride smooth, or like fred flintstones tried and true tire/wheel combination. you have a wonderful day.. yabba-dabba-do.

 

[profo]

Wow, that's huge. Those ST tires come on 10" and the tire is 16" wide (I think 18" overall). I'm not sure how they would work with such a large rim. Just for info, here is the nut that fits the aluminum rims and also my nut for the MRAP with 11.25 bolt circle.

Toby do you know the part number from TRP?

 

[tobyS]

Toby do you know the part number from TRP?View attachment 645707

That is a normal lug nut (right and left thread), a "Williams washer" and a 7/16" long piece from a DOM tube, 1" outside and 3/4" inside, all on a bolt that is the same thread as the stud.

Or are you referring to the nut for aluminum rims which is like this:

Alcoa #599501 left, #599502 right

 

[red]

thanks much, that is brilliant!
hows the highway ride?
( frankly thats what I'm looking for with using Mrap wheels, fatter, bigger tire, polished aluminum for the pimp look and super smooth on road ride. I'm looking at about 85% on road 15% off)

For a smooth ride the tires/wheels need to be balanced. A cheap way (what I'm doing on my m816) is to pour some coolant inside the tires to act as the balancing media. 1/2 a gallon in each 395 tire has made a huge improvement on the ride quality. Can't use the standard balancing media (powder, BB's, etc) because of the tar left over from the run flats but the coolant works fine.

 

[tobyS]

For a smooth ride the tires/wheels need to be balanced. A cheap way (what I'm doing on my m816) is to pour some coolant inside the tires to act as the balancing media. 1/2 a gallon in each 395 tire has made a huge improvement on the ride quality. Can't use the standard balancing media (powder, BB's, etc) because of the tar left over from the run flats but the coolant works fine.

Or use a hub with reasonable bearings, clean dry and not tight, where the heavy side will go to the bottom. Have adhesive weights ready and stop when you put it at 90* and it doesn't go either up or down.

I have a precision balancing tool I made for holding shafts that have large material moving blowers, static balancing this way and they run incredibly smooth. If it takes a lot of weight, split it up and distribute. I notice on my A3 that the CTIS is installed but not the corresponding counterweight, so know where a piece of my balance problem comes from.

 

[tobyS]

I've always been a bit confused how putting in something with weight, a fluid, heavier than air, could make a counterbalance to an already heavy side. Can you explain how that works? Unless the problem is an out of round tire and the large side is the least weight, what makes the fluid or balls to be a counterbalance for the heavy side? What makes the material go opposite to the heavier side (if the tire is round)? It would seem to make the problem worse, but I know some people swear it works. How?