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#1449500 Tue Apr 26 2022 03:22 PM
Joined: Apr 2022
Posts: 8
B
'Bolter
I have searched throughout the internet and big bolt threads for the past few days and it seems the more information I gather, the more I grow confused.

I am an college student and I have recently acquired and strong interest in making my 56 4400 my daily driver/ tree trimming rig.

I understand the 56-59 22.5 wheels for the 1.5 ton trucks are sought after, but I don’t exactly understand why. I believe it’s for the 22.5 size but aren’t they still rh5 wheels? And are the sought after wheels in question 10 lug? I have been trying to figure out the exact answer to that for I have a 56 1.5 ton but I have 6 lug rh5s.

I also am confused with the budd style stud guided vs hub piloted. I understand that the budd style wheels use the 1.5 in square stud. It also appears that the hub has a concentric extrusion that seems to pilot the wheel on as well. I just clarification on my configuration. My wheels have the square studs and are six lug. Which I believe to be the budd wheels.

On top of that I have not been exactly able to find the bolt pattern for my 56 4400. I am needing to know the bolt pattern and center hole size as I am about to start searching the big truck salvage yards for some good candidate wheels for slight modification. I would measure the bolt pattern but I am 3 hours away from home at school and am looking to take this on as a summer break project. (Yes I will be adding OD and fooling with brakes but I need to sort this out first thing before anything else)

I hate to post more big bolt wheel threads but I have not been able to pin point details for my exact configuration. I have attached a picture of my rear wheels. I appreciate any information I can get. This forum ROCKS!

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9DCA13E5-D328-4D1C-A2FF-7543CAF912C0.jpeg (368.37 KB, 130 downloads)
Joined: Dec 2015
Posts: 2,312
Big Bolt Forum Moderator
welcome to the site! Are you certain that is a 4400 and not a 6400?

your wheels are the 6 hole "Budd" wheels. Stud centered, not hub centered. They made those for both 20" and 22.5" tires.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery [stovebolt.com]


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery [stovebolt.com]

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery [stovebolt.com]

Sufficient unto the day is the evil thereof
Joined: Apr 2022
Posts: 8
B
'Bolter
The serial number and badging show to be 4400. With a gvw of 14,000. Maybe not out the question that the rear could’ve been swapped with a 6400 back in the day? Not too sure but is there is 5 lug in the front. Is there a difference between the six lug on the 4400 vs the 6400? Center hole bore? Thank you 69Cuda.

Joined: Dec 2015
Posts: 2,312
Big Bolt Forum Moderator
5 lug front sounds like a 4400, 6 lug rear, is it a 2 speed? sounds like it was swapped out, as they should have matched from the factory (4400 should have used the 5 in front and 10 in rear, same pattern, 10 holes in all wheels, but only used 5 of them in front). I have not seen a 4400 with 6 bolt wheels, but I am not an expert on the big bolts, there are others with way more experience than me! (and way more trucks!)


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery [stovebolt.com]


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery [stovebolt.com]

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery [stovebolt.com]

Sufficient unto the day is the evil thereof
Joined: Apr 2022
Posts: 8
B
'Bolter
Yessir it is an electrically actuated 2pd rear. I had not even questioned the different lugs as I assumed that was a weird big bolt thing. That actually adds some interesting history if that’s indeed the case! Thanks!

Joined: Dec 2015
Posts: 2,312
Big Bolt Forum Moderator
sounds like someone swapped out the rear end.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery [stovebolt.com]


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery [stovebolt.com]

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery [stovebolt.com]

Sufficient unto the day is the evil thereof
Joined: Apr 2022
Posts: 8
B
'Bolter
Well this is all making a whole lot more sense to me as I have been reading so much contradictory information that confused me something awful haha. Guess I’ll be looking out for and original rear and wheels or the 6400 front axle and wheels.

Joined: Mar 2004
Posts: 5,539
M
'Bolter
Welcome to the Stovebolt wave

Your truck was not born with that rear...we'll need to see some pictures in order to help determine what you have.

The difference between the 20" and 22.5" rims is that the 20's are multi piece that use a tube type tire and the the 22.5 are one piece that use a tubeless tire. Lots of old farm trucks can be found running a mix of 20" and 22.5" as they were designed to be replacements for each other. The 6-lug 22.5's are a lot easier to find than the 10 lug.

Original wheel center hole would be 5.25"...you'll need to measure your rear hub to see what the hole size is since it's not stock.

Mike B smile

Joined: Jun 2011
Posts: 4,522
E
'Bolter
Rh5’s were only on 20” wheels that come apart, all 22.5” wheels are one piece, drop center. I think those 6 lug wheels came on 3 ton trucks.

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.
Joined: Apr 2022
Posts: 8
B
'Bolter
Now this is making a lot of sense to me now haha. My fronts are the 22.5 wheels as they do have tubeless tires. I believe I found a vin decoder for these trucks and I was able to determine that the truck is in fact a 4400.

So now I understand that the 22.5 wheel, 6 and 10 lug, all were single piece tubeless, great!

Now, were the six lug 22.5s and option for the 1.5 ton or for strictly put on the heavier trucks. Another way to ask I suppose is did the heavier trucks, 6400, etc come with 22.5 single piece wheels? If so, I am on the search.

Thank you Mike B and EdPruss. I have really been searching for this information!

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Moderated by  69Cuda, Grigg 

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