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 ?

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

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.

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

Re: Early 21 inch wheel vs later 21 inch wheel
 

I second this. I've seen bad things happen.

Re: Early 21 inch wheel vs later 21 inch wheel
 

Mix ups can cause inner wheel center hub cracks!!!
Bill Mixedup

Re: Early 21 inch wheel vs later 21 inch wheel
 

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.