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Old 09-16-2020, 08:41 AM   #1
Burgamot
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Default Wheel interchange

I was visiting with another a owner on wheel interchange. The discussion was would a wheel from a 28-29 fit on a 30-31? I said it should with the exception of the hub caps. Who is right?
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Old 09-16-2020, 10:38 AM   #2
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Default Re: Wheel interchange

They are all interchangeable other than the caps


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Old 09-16-2020, 10:43 AM   #3
Charlie Stephens
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Default Re: Wheel interchange

They interchange except the caps assuming they are not the AR (early '28) wheels.

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Old 09-16-2020, 11:25 AM   #4
Jim Brierley
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Default Re: Wheel interchange

You can also use 1935 Ford 16" wheels or 16" Kelsey-Hays wheels. Later Ford wheels have the same bolt pattern but need a spacer to prevent wheel cracking.
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Old 09-16-2020, 11:33 AM   #5
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Default Re: Wheel interchange

add to all the useful info above .. When I measured them a few years back the fitted 4.50x21 had a rolling perimeter of 2450mms and the fitted 4.75-5.00 x19 had a perimeter of 2300mms... So you may fine the gearing slightly different .. ( I'll let you convert millimetres into feet and inches )

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Old 09-16-2020, 11:39 AM   #6
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I ran 18"s on my A 50 years ago.
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Old 09-16-2020, 01:03 PM   #7
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Default Re: Wheel interchange

I've used 15 inch wheels on one of my model A's with no problem except it looks more like a hot rod . I also like hot rods and figure if it suits me it is OK .
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Old 09-16-2020, 02:25 PM   #8
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Default Re: Wheel interchange

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Originally Posted by johnbuckley View Post
add to all the useful info above .. When I measured them a few years back the fitted 4.50x21 had a rolling perimeter of 2450cms and the fitted 4.75-5.00 x19 had a perimeter of 2300cms... So you may fine the gearing slightly different .. ( I'll let you convert centimetres into feet and inches )

Damnit, I didn't know there was going to be a math problem to solve!
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Old 09-16-2020, 04:27 PM   #9
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Default Re: Wheel interchange

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Originally Posted by tinkirk View Post
They are all interchangeable other than the caps


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My friend has 29 wheels on the back and 31 on the front. And no caps!
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Old 09-16-2020, 04:49 PM   #10
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Default Re: Wheel interchange

When I put 19" wheel on the back of my '28, he hubs push the hub caps off and I can't see what is causing the hub/axle to protrude further than it would on a 30-31
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Old 09-16-2020, 04:54 PM   #11
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Default Re: Wheel interchange

Just to complicate your mathematical exercises for the day. A Firestone tyre will have a slightly different rolling perimeter than a Goodyear tyre.
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Old 09-17-2020, 01:23 AM   #12
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Default Re: Wheel interchange

Quote " Damnit, I didn't know there was going to be a math problem to solve!".... Yep and I originally goofed it by quoting the figures as centimtres instead of millimetres!!! I've changed the post now

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Old 09-17-2020, 08:31 AM   #13
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Default Re: Wheel interchange

16" Ford or Kelsey Hayes wires and modern radials.Better ride,better braking,better handling.
Could never understand the 'looks' argument,the car is safer to drive and a better ride with modern tire sidewall flex and more tread contact..

I believe this is also a reason why the car endured,removing the 21's or 19's on a worn used car and fitting 16's changed how it rode and felt,they were less apt to sell or scrap it.

Last edited by Jack Shaft; 09-17-2020 at 08:50 AM.
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Old 09-17-2020, 08:55 AM   #14
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Default Re: Wheel interchange

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16" Ford or Kelsey Hayes wires and modern radials.Better ride,better braking,better handling.
Could never understand the 'looks' argument,the car is safer to drive and a better ride with modern tire sidewall flex and more tread contact..
If you are THAT concerned about safety you should be putting the front fenders back on your car as it would be much safer should you get caught in a rain storm rather than removing them for "looks".
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Old 09-17-2020, 09:08 AM   #15
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Default Re: Wheel interchange

dont rain much here...but thanks for your concern.
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Old 09-17-2020, 11:08 AM   #16
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Default Re: Wheel interchange

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I believe this is also a reason why the car endured,removing the 21's or 19's on a worn used car and fitting 16's changed how it rode and felt,they were less apt to sell or scrap it.
I believe it was more that it was easier to get 16" tires during the war than 19" and 21" than it was for comfort. That is why a lot of Model A wheels were reduced in size. I just seen a set of 16" "Model A" wheels the other day.
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Old 09-17-2020, 11:14 AM   #17
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Default Re: Wheel interchange

Ruth, you are absolutely right! During WII, 19's and 21's were not available.
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Old 09-17-2020, 12:24 PM   #18
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Default Re: Wheel interchange

26-27 Model T wire wheels LOOK like the 28-29 Model A wheels - but the bolt circle is different and won't fit.


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Old 09-17-2020, 04:21 PM   #19
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Default Wheel interchange

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Originally Posted by Jim Brierley View Post
Ruth, you are absolutely right! During WII, 19's and 21's were not available.

I didnít know that. How come the 19ís and 21ís were not available, but 16ís were available?


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Old 09-17-2020, 05:21 PM   #20
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I didn’t know that. How come the 19’s and 21’s were not available, but 16’s were available?
Shortage of rubber, all rubber went for war effort. Not too many Jeeps and trucks with 4.75X21 tires.

They rationed gasoline not because we didn't have gas, it was to cut down on people driving and using up their tires. Most all latex came from Asia with some coming from Brazil.

Plenty of good books with interesting facts about the WWII. IMO, none of the good stuff was taught in school.
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