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Joined: Dec 2004
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I am trying to guage what tire size to run on my 1940 3/4 ton. I have 16 inch rims currently with 650 bias ply whitewalls, but will probably change them out for a more modern rim with greater offset.

What is the biggest tire size you can get under an art deco truck without clearence issues? Front? Rear? any hints on offsets to avoid rubbing in the front?

Joined: May 2005
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my 52 1 ton will fit 31" tries max up front before they rub the rear edge of the fenders.
My tires are 8R19.5


•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-
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fit close in the rear also, but could probably go an inch or two bigger in the rear


•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: Feb 2005
Posts: 338
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Bigbadswingdaddy,

I just had custom offset wheels made for my 1940 1/2 ton. I am running a 1955 1st series rear end, which is 2 inches wider than the original. With the wider width the the mounting surface was exactly 1 inch offset inside the fender of my 1940. I beleve (please measure for yourself) that there is a little over 11 inches of wheel well on my 1940. That gives me 6 inches from the bed to the end of the axle and a little over 5 inches from there to the inside of the fender lip. I think you can easily fit a 235 or 245r70 16 radial in there.

Diamond Back Classics list there radials at:

235R70 16 cross section at 9.5 inches
245R70 16 9.8
255R70 16 10.2
265R70 16 10.7

Coker classic has a 750R16 that is only 8.0 inches wide.


Bill Schickling

1940 1/2 ton, 1940 3/4 ton
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Bill if I understand your post... If you went for a 7 inch wide rim, you would have 4 inches of backspacing in the rear? Do you remember what that 55 axle measured wheel mount to wheel mount?

Thanks,
John

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Uhhh... Grigg, my TF truck has 8R19.5's as well, but mine are more like 33 to 34 inches.

Here's a Goodyear tire link for an 8R19.5.
http://www.goodyear.com/cfmx/web/truck/line.cfm?prodline=160105&webprodline=G633%20RSD

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John,

The 1955 axle is 61 inches mount to mount. Right on the back spacing. 1 inch wider in the inside than the outside.

Bill


Bill Schickling

1940 1/2 ton, 1940 3/4 ton
My web page
Joined: May 2005
Posts: 8,878
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jhaa_lives,
You are correct, I did some checking and mine are 33.5" tall unloaded, the average of your estimate no less.

I am running Goodyear G-171 as seen here http://www.ricksontruck.com/tires_8R195.html

They had the best price by far when I bought mine about 2 years ago.


•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-

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