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Mounting Simplex RD

Old 10-10-22, 10:45 AM
  #1  
sortieavelo
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Mounting Simplex RD

Hi,




Hi,

i really want to use this Simplex LJ RD on this vintage Peugeot frame (I think itís a PN-10 (531 main tubes). The dropouts donít have an integrated mount.

Seems like you could just mount it at the back of the dropout with internal screw, but the little tab doesnít seem to clear the dropout.

am I missing something? Any suggestions?

thank you!!
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Old 10-10-22, 01:57 PM
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Originally Posted by sortieavelo View Post
Hi,

i really want to use this Simplex LJ RD on this vintage Peugeot frame (I think it’s a PN-10 (531 main tubes). The dropouts don’t have an integrated mount.

Seems like you could just mount it at the back of the dropout with internal screw, but the little tab doesn’t seem to clear the dropout.

am I missing something? Any suggestions?

thank you!!
Yeah, an unthreaded Simplex dropout.

simplex dropouts

​​​​​​https://www.redclovercomponents.com/blog/1
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Old 10-10-22, 02:11 PM
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Or you need to find a correct upper bolt and claw for it.
Looks like someone hacked the hanger off your dropout.
Best advice - find a suntour with a claw mount and run that

Welcome to the world of French bicycles
​​​​​​Simplex SLJ 6600 real life capacity

​​​​​​Humbled by Simplex

Last edited by dedhed; 10-10-22 at 02:14 PM.
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Old 10-10-22, 04:57 PM
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OP: You might want to read the Red Clover Components article linked above. (You may have to cut and paste the text of the URL into your browser's URL window - for some reason, when I try the link in the comment above I keep getting a Bike Forums discussion instead of the article. Direct link to article here.)

That article has a section on Simplex hangers. BLUF: according to the article, there's no "standard" Simplex hanger (they vary) - and there's no easy way to tell which Simplex hanger goes with which Simplex RD.

The silver lining? Also according to the article, direct-mount Simplex RDs work fine when mounted on a Campagnolo hanger. The Simplex mounting bolt is 9mm and will fit through the 10mm threaded hole on the Campagnolo RD hanger.

Disclaimer: haven't tried this myself, and I have little knowledge or expertise regarding French bikes or components. But Red Clover is a good source of info.

Last edited by Hondo6; 10-11-22 at 04:20 AM. Reason: Add direct link to Red Clover Components article.
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Old 10-10-22, 11:42 PM
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What dedhed said. Somebody filed off your hanger to make their single-speed look more elegant. You need a claw. And because of the thickness of the dropout, you will probably need a longer bolt to attach the claw. And you might need some washers because the claw will be thinner than the hanger that used to be on there.

But don't try to attach it as shown. It will never work.
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Old 10-11-22, 05:56 AM
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Alternately you could get a simplex hanger brazed back on to the dropout. That would probably require finding a donor dropout on an old frame.



​​​​​​Should I trust this welded on derailleur hanger?
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Old 10-11-22, 07:49 AM
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Originally Posted by dedhed View Post
Alternately you could get a simplex hanger brazed back on to the dropout. That would probably require finding a donor dropout on an old frame.

N.B. the donor dropout need not be unthreaded or without a pivot stop; those features are superfluous to mounting a Simplex derailleur, but their presence does not affect how the Simplex derailleur mounts or operates. Indeed, later production Simplex dropouts were both threaded and provide pivot stops, so that non-Simplex derailleurs can also be mounted:
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Old 10-21-22, 09:20 PM
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You appear to have been Drewed.

That sucks.

Because Drew sucks.

--Shannon
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Old 10-21-22, 09:34 PM
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Here is a couple of old Threads that offer a few solutions...

Derailuer Hangar Welded - "Puch"

Old Frame, no Derailleur Hanger
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Old 10-23-22, 04:40 AM
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Originally Posted by ShannonM View Post
You appear to have been Drewed.

That sucks.

Because Drew sucks.

--Shannon
For those who don't know the "Drew tale of woe":

Tommasini: I hate Drew more than words can tell
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Old 10-23-22, 12:54 PM
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You may need something like this



https://www.ebay.co.uk/itm/201638067...Bk9SR4DgguOAYQ
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Old 10-23-22, 02:13 PM
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Originally Posted by JoeTBM View Post
Also available on eBay from a US source w/free shipping:

https://www.ebay.com/itm/223928469675

and from Amazon at a somewhat higher price.
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