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Cyclone on a Simplex drop-out...

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Cyclone on a Simplex drop-out...

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Old 09-20-22, 04:28 AM
  #1  
ehcoplex 
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Cyclone on a Simplex drop-out...

Is mounting a Suntour Cyclone MKII RD on a Simplex DO (older, non-threaded) just a matter of tapping the hole, or does a stop have to be ground into the DO as well?
*this is a not an 'important', sought-after or collectible frame, and I don't care about modifying it- though if it does require grinding a stop I may just slap a claw on instead.

Last edited by ehcoplex; 09-26-22 at 05:30 AM.
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Old 09-20-22, 05:36 AM
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Grinding would be required. I have a frame with a brazed-on stop at 7:00, but it still had to be ground from the 7:00 to 9:00 positions. My TdF was tapped and ground long ago, no brazing.
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Old 09-20-22, 06:40 AM
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This is useful info on simplex drop outs (and other drop outs as well):

https://www.redclovercomponents.com/blog/1

Maybe look for a shimano crane RD if you don't want to grind a stop on the DO?
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Old 09-25-22, 10:34 PM
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[QUOTE=bikemig;22653419]This is useful info on simplex drop outs (and other drop outs as well):

https://www.redclovercomponents.com/blog/1

Nice article!
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Old 09-26-22, 10:03 AM
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French bikes!




Sorry, that's all I have to say.
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Old 09-26-22, 10:33 AM
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An acquired taste, n'est-ce pas?
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Old 09-26-22, 11:02 AM
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It is too bad that the photos are not in the post below, since Rootboy had nice photos of a custom made adapter.

https://www.bikeforums.net/classic-v...ecution-2.html

I bought an adapter and derailleur from Rootboy several years ago and I might end up mounting it on my purple Gitane TdF. If so, I will try to remember to take photos.

RIP Rootboy. I hope you have a tailwind...and don't need your thorncatchers.

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Old 09-26-22, 04:58 PM
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Originally Posted by beech333
It is too bad that the photos are in the post below.
You mean "aren't" in rootboy's thread. That is a real shame; I remember this, and had a notion to copy them, but ultimately didn't. Has anyone tried to resuscitate them using the Wayback Machine? Does that not work if they were stored on another site?
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Old 09-26-22, 05:21 PM
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Originally Posted by Charles Wahl
You mean "aren't" in rootboy's thread. That is a real shame; I remember this, and had a notion to copy them, but ultimately didn't. Has anyone tried to resuscitate them using the Wayback Machine? Does that not work if they were stored on another site?
Thank you. I corrected my post.

I wonder if I should try measuring it. I do have access to cmm's and laser scanners, though I don't know what I would do with those measurement results. I certainly don't want someone else making money off of his ideas.

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