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#1217167 05/14/2017 2:16 AM
Joined: May 2015
Posts: 35
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Wrench Fetcher
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I just got some 19.5" wheels for my '48 3800 dually. Unfortunately, I made a dumb move and forgot about checking on crucial clearance. The wheels hit the brake drum and are about 1" from the hub. Since they are hub centric, I feel like a spacer is not a wise option. Anyone have other ideas? Is there someone that makes hub centric spacers for the 4.56" bore? I've only found bigger ones.


Aaron V.
1948 Chevrolet 3800 216/4-spd
1979 Chevrolet C30 Ramp Truck 454/TH-400
1995 Jeep Cherokee 4.0/5-spd
1970 Ford F100 390/4-spd
1973 Ford Maverick 302/C4
2004 Honda Shadow 1100

"While driving yesterday I saw a banana peel in the road and instinctively swerved to avoid it᠁thanks Mario Kart."
Joined: Feb 2004
Posts: 29,760
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Kettle Custodian (pot stirrer)
Kettle Custodian (pot stirrer)
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Any good machine shop should be able to fabricate a set of spacers, but be aware you'll also have to install longer lug studs to accommodate them. They will be e$$pensive! Do you still intend to run dual wheels? If so, remember to make the new hub-centric area wide enough to handle centering both wheels. I'd strongly recommend steel, not aluminum for the spacers.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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Try some other 19.5" wheels. The ones I found (used) fit on my 51 one ton dual just perfect, something like 1/4" clearance at corner of brake drums to wheel dish.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: May 2015
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Wrench Fetcher
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I do still intend to run duals in the back. Might have to see if I can find a machine shop in the area, different wheels may not be a viable option. It took me almost a year to find the 19.5's that I did, don't seem to be many in this area.

I have found hub centric spacers which have a 116.7 mm bor which converts to 4.59" (and change)...I am assuming that will not work, correct? My understanding is that 4.56" needs to be exact.


Aaron V.
1948 Chevrolet 3800 216/4-spd
1979 Chevrolet C30 Ramp Truck 454/TH-400
1995 Jeep Cherokee 4.0/5-spd
1970 Ford F100 390/4-spd
1973 Ford Maverick 302/C4
2004 Honda Shadow 1100

"While driving yesterday I saw a banana peel in the road and instinctively swerved to avoid it᠁thanks Mario Kart."
Joined: May 2005
Posts: 8,878
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Let's see a picture of those wheels.
I remember now having owned a set of 8 lug 19.5 duals with an uncommon center style. They were more cone shaped, these might be what you have?
The 19.5" wheels that fit on my truck, and most all that I see out there have a concave, spherical shape to the center dish.

Wheel adapters or spacers just sound like a bad idea, and expensive.

Also, have you considered a 14 bolt rear axle swap to get faster gears and more modern drum brakes with available replacement drums on shelf at parts stores still?
That would likely also solve the problem and let you use wheels you have.

Grigg


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: May 2015
Posts: 35
A
Wrench Fetcher
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Posts: 35
Originally Posted by Grigg
Let's see a picture of those wheels.
I remember now having owned a set of 8 lug 19.5 duals with an uncommon center style. They were more cone shaped, these might be what you have?
The 19.5" wheels that fit on my truck, and most all that I see out there have a concave, spherical shape to the center dish.

Wheel adapters or spacers just sound like a bad idea, and expensive.

Also, have you considered a 14 bolt rear axle swap to get faster gears and more modern drum brakes with available replacement drums on shelf at parts stores still?
That would likely also solve the problem and let you use wheels you have.

Grigg

The wheels I have are an Accuride 29015, I believe. I might call them more cone shaped so that very well could be what you're thinking of. Here is a picture of them: https://www.dropbox.com/s/xzqy9rwidwcb6gt/IMG_20170106_230551036.jpg?dl=0

And on the front of the truck, they fit perfectly there: https://www.dropbox.com/s/s0zpr10shgf25oi/IMG_20170427_194104209.jpg?dl=0

I agree, I do not like the idea of adapters/spacers either but I am not sure if there are any other viable options.

I have thought about doing a rear-end swap but I am not sure if I want to go that far into this truck, I don't currently plan to keep it. I am mostly just getting it in good running/driving shape for the next person to either take over and finish it or just take it and use it. I also do not have any equipment/expertise for welding, etc.; are there rear ends out there that will just be a direct bolt-on for the '48?


Aaron V.
1948 Chevrolet 3800 216/4-spd
1979 Chevrolet C30 Ramp Truck 454/TH-400
1995 Jeep Cherokee 4.0/5-spd
1970 Ford F100 390/4-spd
1973 Ford Maverick 302/C4
2004 Honda Shadow 1100

"While driving yesterday I saw a banana peel in the road and instinctively swerved to avoid it᠁thanks Mario Kart."
Joined: Jun 2011
Posts: 5,096
E
Crusing in the Passing Lane
Crusing in the Passing Lane
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Posts: 5,096
Nice truck.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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Yes, looks like wheels I was thinking of.
Someone ought to trade you wheels, or find the other version and sell those. They're out there.

Spacers are usually just asking for trouble. Do it right and just get wheels that fit.

Or
The 14 bolt only needs spring pads cut off and new aftermarket ones welded on, you can hire the welding done.
Plenty of threads and discussions here about the 14 bolt rear swap.
I have some, but have not completed the swap yet, not enough time in the week.... make that year.


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: May 2015
Posts: 35
A
Wrench Fetcher
Wrench Fetcher
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Joined: May 2015
Posts: 35
Originally Posted by EdPruss
Nice truck.

Ed


Thanks!

Originally Posted by Grigg
Yes, looks like wheels I was thinking of.
Someone ought to trade you wheels, or find the other version and sell those. They're out there.

Spacers are usually just asking for trouble. Do it right and just get wheels that fit.

Or
The 14 bolt only needs spring pads cut off and new aftermarket ones welded on, you can hire the welding done.
Plenty of threads and discussions here about the 14 bolt rear swap.
I have some, but have not completed the swap yet, not enough time in the week.... make that year.


I guess the search continues for one or the other, I was already leaning away from spacers to begin with, as I mentioned but now I have been convinced against it by a combination of you and myself lol.

Found a few 14 bolts locally but they look fairly junky...though I haven't popped the cover off mine yet to know if it's even worth saving. I would assume I should be ok to just install my outer wheels to at least get it back on the ground?


Aaron V.
1948 Chevrolet 3800 216/4-spd
1979 Chevrolet C30 Ramp Truck 454/TH-400
1995 Jeep Cherokee 4.0/5-spd
1970 Ford F100 390/4-spd
1973 Ford Maverick 302/C4
2004 Honda Shadow 1100

"While driving yesterday I saw a banana peel in the road and instinctively swerved to avoid it᠁thanks Mario Kart."

Moderated by  Dusty53 

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