Axle Width Wms Help

[COFFMAN]

I am currently working on options for my front and rear axle assembly.

I can get a front 44/60 Hybrid ( Dynatrac ) Which has a WMS of 63.5in as opposed to the 60.5in standard width.

I want to run 16 x 8 rim, 32-33in tyres with 4-5in lift and i really want to keep the original 99+ fender flares

 

Can this be done, what back spacing would i need, any clues on what the wheel track would be.

 

The reason i have asked the question is i believe when fitting locking hubs to a D44 it also increases the WMS so someone may have done what i am asking.

 

The rear axle D 60 can come in 63.5 or 60.5in which is'nt a problem as wheel spacers are often used to push the rear wheels out. But i don't want to run different back spacing on the front and rear rims

 

I can run a D 44 standard width in the front but i do like the 35 spline axles in the 44/60 Hybrid

Thanks for any help advance

[mvusse]

The body of a Comanche is wider in the rear than the front. To get the wheels to look even, even with the same width axles, takes 1.5" spacers already.

 

My daughter's Cherokee runs 32x10.50 tires (265/75R16) on stock Liberty 16x7 rims with about 3" of lift. That was the only way to fit them inside the flairs, but they do rub on the control arms when turning, and just barely fit. I actually had to cut some of the plastic away on the inside bottom corners of the flairs, but not visible from outside. 4-5" of lift may work a bit better. On a 3" wider axle, you will have to bump stop to keep them off the top of the flairs during uptravel.

 

I suggest against 33x12.50 tires unless you lift 6.5" front, SOA rear. I tried to run 33" tires on 4.5" front lift and could not keep them out of the front and back of the flairs when turning. That was on 15x8 wheels with 4" BS. 33x10.50 may work better but are a more difficult to find size.

 

Currently I'm riding jackstands while swapping in a full width D60 with 37s on recentered Hummers. Don't know yet how well they clear the fenders, but I believe the point may be moot as they will sit almost completely outside the body.

[Eagle]

I am currently working on options for my front and rear axle assembly.

I can get a front 44/60 Hybrid ( Dynatrac ) Which has a WMS of 63.5in as opposed to the 60.5in standard width.

I want to run 16 x 8 rim, 32-33in tyres with 4-5in lift and i really want to keep the original 99+ fender flares

 

Can this be done, what back spacing would i need, any clues on what the wheel track would be.

 

Stock 15x7 rims have 5-1/4" backspacing, and are the optimum setup (on stock axles). An 8" rim is 1 inch wider (duh!), so to sit in the same place the wheels would need to have 6-1/4" backspacing.

 

Now take an axle that's 3 inches wider, and that adds 1-1/2" on each side. So to pull the tires back to the stock location, the wheels would now need 6-1/4 + 1/1-2 = 7-3/4" backspacing. If such a critter existed (which I'm sure it doesn't), it would have so much offset that it would eat up wheel bearings due to eccentric loading, and I suspect steering would be rather ... unusual.

[87Warrior]

A stock Humvee wheel has 7" of backspacing on a 9" wide wheel, 8x6.5 bolt pattern. Not sure how available those are in your region. My plan is to run the Humvee wheel with 37's on D60's that have a WMS-WMS of about 66".

 

You may want to talk with Trail Worthy about a wheel for your application.

 

www.trailworthyfab.com/

[mvusse]

A stock Humvee wheel has 7" of backspacing on a 9" wide wheel, 8x6.5 bolt pattern. Not sure how available those are in your region. My plan is to run the Humvee wheel with 37's on D60's that have a WMS-WMS of about 66".

 

You may want to talk with Trail Worthy about a wheel for your application.

 

www.trailworthyfab.com/

Supposedly the wheels will interfere with the steering tie rod ends. Forgot to verify this before I had my centers cut out, though.

 

A friend of mine is running stock hummer wheels, but he is running a dual rear wheel front D60 which is about 77" wms to wms.

[87Warrior]

Whoops, good point. I had to do another test fit on my ball joint 60 from a 95 Ford to refresh my memory regarding clearance.

 

The knuckle clears by about 3/16". I suspect the TRE may have some interference, especially if using the GM one ton TREs.

[COFFMAN]

Thanks for the input guys, why this is a ( big ) issue for me is the restraints we have on mods to our rigs over here.

I can increase my wheel track 50mm / 2in thats allowed, but will be using some of that with my 8in rims depending on back spaceing.

If i want to start to push the envelop the truck will have to be engineered, swirve test, brake test etc. Ching Ching $$$

 

And to go down that track ie Long Arms, Bushwackers 35's etc would be cool, but i,m not ready to do that to the only Comanche in Tasmania. Only 6 that i know of in OZ.

I car'nt go down to the local JY and pick up a new bed lol, if i,v trimed it up to fit Bushwackers etc. front guards no problem.

 

So this is where I'm at, D 60 rear 63.5 wms-wms i can get away with that and keep the wheels inside the guards.

Front D 44 60.5 wms-wms and keep the wheels inside the guards.

 

But tempeted to regerister the Comanche with the original axles, and then swap in the 63.5 44/60 Hybird :brows:

[Dirteatr717]

But tempeted to regerister the Comanche with the original axles, and then swap in the 63.5 44/60 Hybird :brows:

This is probably your best bet as itll buy you time to get your setup perfect before you have to register again :driving: