XM816 swap to Michelin 53 Super singles

[CombatJack]

Hi all, I have a set of Michelin 16.00R20 Tires that I put on a set of 10 Lug rims (PN 89193) to do a swap from duals to Super singles on my XM816 Wrecker. (picture attached)

From the research I did, the rim will bolt straight up to the axle already with no modifications. But my question is, how do you install the super single on the rear axle that is supposed to have duals? Is there parts that must come off, or what? Is there a thread on here that already covers this, or a video on youtube that i couldn't find?

Thanks a lot, in advance for all of the help.

-Jack

 

[M35A2-AZ]

You put the dish part out if that is what your asking.

 

[CombatJack]

You put the dish part out if that is what your asking.View attachment 809429View attachment 809429

So the Super single literally just goes right on after I remove the duals? Nothing else needs to be done??
Thanks.

 

[simp5782]

On a wrecker you are going to have zero articulation so stay on paved roads

 

[98G]

So the Super single literally just goes right on after I remove the duals? Nothing else needs to be done??
Thanks.

No modifications need to be made to the axle. You will need to change out the rear lug nuts to ones like you have on the front. They're available at Napa and similar places.

 

[CombatJack]

No modifications need to be made to the axle. You will need to change out the rear lug nuts to ones like you have on the front. They're available at Napa and similar places.

ok, why is that (out of curiosity??) And do you have a part number for them so i can look into it??

 

[98G]

Duals get a two part wheel retention device.

The inner wheel gets a "thimble" that mounts over the wheelstud. And sleeves the wheelstud with larger diameter threads. The outer wheel then goes over the thimble and is retained by a lugnut compatible with these larger threads.

The front wheels are held one with just a lugnut, compatible directly with the wheelstuds.

Sometimes you'll see people use singles on the rear held on with just the thimbles. This is neither safe nor legal. On something as heavy as a wrecker I strongly advise you not to even consider it. Spend the $3-$4 per lugnut to do it right. Note that you'll need 20 left handed lug nuts and 20 right handed lug nuts.

You want the lug nuts identical to the ones on the front of the truck, not the conical ones we use with HEMTT rims. Unfortunately I don't have a part number. (New phone, lost a bunch of data).

The wheels you mounted on are 5ton combat rims. You may have clearance issues on the driver side front using these with 16.00s. On 939series trucks this combination rubs. I don't know that the 809series has this problem.

I have a 939series truck with 16.00s and hemtt rims. No issues. I have an 809series truck with 16.00s and hemtt rims. No issues.

I don't know that I really recommend 16.00s on a wrecker. The loss of bottom end power is going to be very pronounced. The sidewall flex is going to make a much less stable platform than the duals. It is also possible for the tires to contact the bed during articulation. To single a wrecker I personally would use 395s. My 939series wrecker is on 14.00s. I'll be changing to 395s when these wear out. (Too late for you since you already have wheels/tires, but others may want this info)

 

[CombatJack]

Hi all, so 4 of these tires have a slow leak and after a bunch of research, it seems its the O-rings. so i busted one apart, and the O-ring looked good, but there was some rust on the rim halves. So i wire brushed them clean where the O-ring sits, and I have new O-rings to put on. My question is: do i need to blast some primer on the cleaned surfaces before i put the o-ring on, or should i let it be bare metal (i would think rust would build again).
Thanks in advance. These are a bear to work on!

 

[G744]

I don't like the look of the reversed single wheels on the rears, so I pulled the hubs, reversed the studs and bearing races, and reinstalled them.

Now all 6 wheels look the same, with the dish out. A bunch of work, but worth it to me.

You don't have to buy any parts to do this mod, either. Plus it keeps me from falling back to duals.

DDG

 

[charlesmann]

Is there a sound and logical reasoning to left threads on the left side? I know the idea behind it, really necessary?