Dually Questions

[RedTruck]

I'm contemplating trading a new set of Mickey Thompson Classic II's for a full set of dually rims and rear fenders for my rig. I use my rig for hauling on occasion, with loads generally over 10,000 lbs.

My rig is an '84 F250 4x4 extended cab with a D60 front axle out of a dually and a Spicer 70 rear that is original to the pickup.

What I'm wondering from you folks is the following:

What do you all think of a dually over a Single Rear Wheel Rig? This is more of a curiousity question than anything.

Knowing that I've got a D60 from a dually pickup and a Spicer 70 from SRW pickup what adapters/spacers do I need to make everything track right? Does anyone have a recommendation for adapters?

For you fellas that have been hauling a lot, are duallies worth the expense of two additional tires? The trailer is a 28 foot gooseneck with tandem axle duals. I've had a pickup with duals and my pickup with singles on this trailer and don't notice any difference in terms of stability.

Thanks much for any discussion.

Paul

 

[Freight_Train]

Well,for one you will have to break out the sawsall cause you gotta cut a big old gaping hole outta your bedside.Might as well find you a parts truck and swap the rear axle,springs and bed out.Be easier and cheaper.

 

[RedTruck]

Freight_Train, Thanks for the reply

The rear duals will bolt right on, but with the front adapter in place and the front dually rims on it doesn't track right. There are adapters to get things lined up right. You can buy them on ebay or from most good rim shops. I'm just wondering if anyone here has had any experience with any one particular brand, and once installed how do they hold up to heavy loads.

I've also heard of the fenders being added both ways...with cutting out the wells and without. I know it will work with cutting out the wells, but I'm wondering if anyone hear has added fenders without cutting the wells?

Paul

 

[metrojd]

Dually

I just changed my 94 CC into a Dually.
The dually rearend is wider to acomidate the duall wheels,if not you will have to space tha inside wheel out probly 6".
As far as the bed, The bed I got was off a 1988 and it is alot differenrt than I thought.
The bed sides are specially made for clips,for the fenders to bolt into.
I thought I would just get fenders and bolt them on but it isnt that easy.
Unless you find some kind of aftermarket bolt on kit.
I found a parts truck and buying the rear and the bed.
I didnt want to worry about Adapters.
Good luck
John

 

[RedTruck]

6" total or 6" per side. I think the 3" adapters are pretty common, but it seems like the manufacturers are pretty tight lipped with the load capacity.

Thanks

 

[Dsl_Dog_Treat]

Arrow craft makes conversion kits that include fenders for SRW boxes and dually adapters as well.

I remember Darrin Tosh had posted a truck that he did a conversion on last summer.

 

[dsblack]

http://www.wheeladapter.com/DuallyAdapters.asp
This is where I got mine. Get them from the same company when you do it so things are right.
I like them, and have never had an issue, except a broken wheel due to the wrong stly of wheels.
Fred is a old time racer, and was happy to answer any questions I had.

 

[metrojd]

6" total or 6" per side. I think the 3" adapters are pretty common, but it seems like the manufacturers are pretty tight lipped with the load capacity.

Thanks

I measured my SW Rear Backing plate to Backing plate is 54"
The DW Rear is 58 1/2" Aprox.
I used the 6" because that was what I was told.
I figure 2 1/4" spacers.
If I would have known that I might have done the spacer thing.
My CC is rated 9800lb and the dually I got the rear out of was rated @ 11,000.
The only big differance was the SW Rear had 3" shoes and the DW Rear has 3.5.
John

 

[Freight_Train]

Spacers are BAD on wheel bearings so be careful.Also,you gotta remember that a standard wheel the mounting surface on the back side is about middle of the tire(give or take) but on a dual wheel the mounting surface is about even with the face of the tire so if you just put dually rims without the correct hubs and axles the tires will hit the bed.Also,I know on my deuce and half you can take the rear drums and hubs a part and flip them so the lugs and mounting flange are farther out allowing you to run super singles with dual style rims and still have the same track from and rear.Might look into.Never torn apart a D70 so I don't know if it is even possible on our rigs.

 

[metrojd]

Spacing

After thinking about my earler post.
The Numbers I gave were Backing Plate to Backing Plate.
Like I had mentioned the Dually has 3.5 shoes which would add another 1/2 to the spacer and I an not sure the Axle face or the drum could me thicker bringing the wheel out even more.
Just food for thought.
John

 

[dsblack]

The adapters shift the wheels to give the proper clearance. But some are very close, and others allow more clearance. The Dually wheels come in 2 styles, koined, and not koined. They are not interchangeable. And they also use a special lug nut.