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Oct 16, 2021 - 9:30:47 AM
676 posts since 7/28/2005

Guys, I have a one piece flange prewar from 1929. The flange has pulled up quite a bit and is getting fragile. My question: is there a new replacement flange made that will fit without modification to the rim? I appreciate any info.

Oct 16, 2021 - 10:05:08 AM



1950 posts since 11/3/2016

Edited by - heavy5 on 10/16/2021 10:08:36

Oct 16, 2021 - 1:59:16 PM

4680 posts since 11/20/2004

There should be one available but you will need accurate measurements of both the larger and smaller ID where it slides on both the rim bottom and the bead to verify an accurate fit. There are multiple sizes used over the years. Do not be surprised if it has a little egging to it as well. Measure it in opposing directions.

Oct 16, 2021 - 3:10:52 PM

12427 posts since 6/2/2008

Working link to the Prucha flange at Sullivan.

The lower/smaller inside diameter of pre-war flanges was 10-13/16.  Post-war flanges at a certain point had 10-11/16 inches. 

Prucha has promoted its current flange as a faithful reproduction of the pre-war. Either trust the Prucha or measure your flange to be sure.

Oct 27, 2021 - 3:14:25 PM

676 posts since 7/28/2005

Thanks for the replies!

Oct 28, 2021 - 12:32:25 PM
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14325 posts since 10/30/2008
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Be careful your 1929 is not a "fat boy" rim. That used a unique flange I.D. And they tended to fail.

Oct 28, 2021 - 2:43:38 PM

676 posts since 7/28/2005

Old Timer,

Yeah, that's why I asked. Mine is an early fat boy, 9465-xx.

Edited by - Steve Bruce on 10/28/2021 14:44:22

Oct 28, 2021 - 3:58:44 PM
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33 posts since 4/9/2006

I took mine off my 29 fat rim as well. I had Warren Yates turn me a flange to fit. Put the original up safe and sound.

Oct 28, 2021 - 6:20:51 PM

14325 posts since 10/30/2008
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Steve, I think repro fat boy flanges are not catalog items with "the usual" parts suppliers. I think I've read more cases of owners turning down the O.D. of their fat boy rim (gasp!) so a regular flange will fit, than I have of folks finding flanges originally made for fat boy rims. Gibson wised up quick on fat boy rims and one piece flanges; the fat boy rim was thrown under the bus.

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