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Old 05-11-2018, 01:41 PM   #1
johnbuckley
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Default Early 21 inch wheel vs later 21 inch wheel

How can you tell if 21 inch wheel is the early ( AR) type or the later type? Can someone give me the width of the inner centre for the two types ?
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Old 05-11-2018, 02:09 PM   #2
juke joint johnny
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Default Re: Early 21 inch wheel vs later 21 inch wheel

The bead outside of the lugnut holes is about 3/8 " on the later wheel .
on the early wheel it is about an inch.

Sorry I don't have an early wheel to measure

The AR used the same brake drums on the front and back
The AR front drum does not have a collar that goes right up to the bearing cone on the hub, instead it finishes about 2" from the center of the bearing cone

I hope this helps
Easy to spot the difference when you know what to look for
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Old 05-11-2018, 02:46 PM   #3
Great Lakes Greg
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Default Re: Early 21 inch wheel vs later 21 inch wheel

The hub depth on an early wheel is an inch, and later wheels are about an inch and a half.
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Old 05-11-2018, 02:46 PM   #4
Ron in Quincy
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Default Re: Early 21 inch wheel vs later 21 inch wheel

Suggest you refer to the Service Bulletins; you do not want to put AR wheels on "B" drums or "B" wheels on AR drums.

Ron
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Old 05-11-2018, 03:57 PM   #5
steve s
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Default Re: Early 21 inch wheel vs later 21 inch wheel

Quote:
Originally Posted by Ron in Quincy View Post
Suggest you refer to the Service Bulletins; you do not want to put AR wheels on "B" drums or "B" wheels on AR drums.

Ron
I second this. I've seen bad things happen.
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Old 05-11-2018, 04:30 PM   #6
BILL WILLIAMSON
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Default Re: Early 21 inch wheel vs later 21 inch wheel

Mix ups can cause inner wheel center hub cracks!!!
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Last edited by BILL WILLIAMSON; 05-11-2018 at 04:35 PM.
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Old 05-12-2018, 09:08 PM   #7
Ronnie Lawson
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Default Re: Early 21 inch wheel vs later 21 inch wheel

What is the definition for the AR 3.pdf
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Old 05-13-2018, 12:08 AM   #8
Floats
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Default Re: Early 21 inch wheel vs later 21 inch wheel

Hi John,
I posted three photos.
The first is an AR rim and the next two are the later type.
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