Topic: 40 wheels and tire sizes


parrish    -- 07-31-2010 @ 7:47 AM
  If I use 40 backing plates etc. on a 36, what year wheels would fit...in other words, what years were the same as the 1940 bolt pattern and offset. Also, what is the recommended tire size for the 36 fender cavity and 40 wheel as far as backset (assuming the 1940 offset)? Whew!


trjford8    -- 07-31-2010 @ 8:05 AM
  The 40 wheel is 16X4 unless they were from a V-8 60 car and those were 16X3 1/2(very rare wheel). The 16X4 was used through 48 on the Fords.Bolt pattern and offset were the same through 48. The tire size used was a 6.00X16 which is the same size as the 36 tire. You can use 37-39 drums with the 40 backing plates. This will allow you to use stock 36 wheels and retain the stock look of your car.


parrish    -- 07-31-2010 @ 8:35 AM
  Thanks TRJ! I'll check out the original drums next time I see the car, although I suspect serious wear. I do have 40 drums that seem fine (as close to 12.0 as my eye can tell), but I do like the 36 wheels and caps a lot more, so thanks for the insight!


parrish    -- 07-31-2010 @ 8:38 AM
  TRJ: I swear that back in 1971, I bought new VW drums for my 39...am I dreaming or did they fit?


trjford8    -- 07-31-2010 @ 6:59 PM
  parrish, the VW drums do look very similiar to the 36 drums, but they will not work. If memory serves me the VW did not use tapered rear axles.I think they were splined.VW drums are also based on the metric system so the fronts would not work either.


1934 Ford    -- 08-01-2010 @ 7:01 AM
  Parrish,
I used the 40 backing plates and spindles on one of my 34's and could use the brake drums with the 5 1/2" stud pattern. The drums are the key to wheel choice. With the 40 drums, I could use any wheel 1928-1935, ranging in size 21" to 16" in wire wheels or the 1940
& up steel wheels. I used the optional 16" bent spoke wire wheels for the 1934 Ford. The key is what drums you use.
I've seen 1936 Fords with 1940 brake drums and 1935 Ford 16" wire wheels! Looked fantatic!!!


parrish    -- 08-01-2010 @ 8:41 AM
  ok, almost there...what prevents the 36 drums from being used with the 40 backing plates? Aren't the 36 drums the same wide bolt pattern as 37-39 drums?


1934 Ford    -- 08-01-2010 @ 9:09 AM
  The 1936, 1937 & 1938 and I think the standard 1939 used a bolt pattern similar to the old wide VW wheels.
In 1940 Ford went back to the 5 X 5 1/2" lug pattern of the early cars on the brake drums.
The drums are what determine which wheel you can use.
Somebody else will have to tell you if the drums are interchangable. I'd like to know too.



TomO    -- 08-02-2010 @ 8:19 AM
  The 36 drums have the same wide bolt pattern as the 37-39 drums, but the Green Book does not show them as interchangeable.

Tom


ford38v8    -- 08-02-2010 @ 7:54 PM
  The drums are interchangeable, but there were some changes that a Concourse Judge may pick out as incorrect if later drums are used on a '36 or vice versa.

Alan


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