Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Simplex Rear Derailleur hanger to dropout conversion

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Simplex Rear Derailleur hanger to dropout conversion

Old 07-20-22, 08:28 AM
  #1  
ob2s
Junior Member
Thread Starter
 
ob2s's Avatar
 
Join Date: Nov 2013
Location: SW Portland Ore
Posts: 84

Bikes: 1964 TdF Peugeot PX-10 / 1988 Peugeot Comete (NOS)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked 4 Times in 3 Posts
Simplex Rear Derailleur hanger to dropout conversion

Is it possible to remove a hanger and fashion a way of mounting it to a simplex dropout ? Would I have to 'make' an adapter ? It is clearly a nut vs bolt situation. Thanks


ob2s is offline  
Old 07-20-22, 09:33 AM
  #2  
gugie 
Bike Butcher of Portland
 
gugie's Avatar
 
Join Date: Jul 2014
Location: Portland, OR
Posts: 10,805

Bikes: It's complicated.

Mentioned: 1198 Post(s)
Tagged: 0 Thread(s)
Quoted: 4188 Post(s)
Liked 3,921 Times in 1,706 Posts
What is it you're trying to accomplish? Are you trying to use a derailleur that works with the Simplex unthreaded dropout? Are these pictures from your bike, or something you found on the internet?

I do a lot of frame modifications for others, I'm not sure what you want.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
gugie is offline  
Likes For gugie:
Old 07-20-22, 10:19 AM
  #3  
kroozer 
vintage motor
 
kroozer's Avatar
 
Join Date: Sep 2008
Location: Tepic, Nayarit, Mexico
Posts: 1,508

Bikes: 48 Automoto, 49 Stallard, 50 Rotrax, 62 Jack Taylor, 67 Atala, 68 Lejeune, 72-74-75 Motobecanes, 73 RIH, 71 Zieleman, 74 Raleigh, 78 Windsor, 83 Messina (Villata), 84 Brazzo (Losa), 85 Davidson, 90 Diamondback, 92 Kestrel

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 119 Post(s)
Likes: 0
Liked 60 Times in 47 Posts
Try the easiest thing first, remove the hanger and see if you can mount the derailleur straight onto the dropout. It looks like both are Simplex, so hopefully this will work.
kroozer is offline  
Likes For kroozer:
Old 07-20-22, 11:01 AM
  #4  
bikemig 
Senior Member
 
bikemig's Avatar
 
Join Date: Apr 2012
Location: Middle Earth (aka IA)
Posts: 19,613

Bikes: A bunch of old bikes and a few new ones

Mentioned: 169 Post(s)
Tagged: 0 Thread(s)
Quoted: 5530 Post(s)
Liked 2,490 Times in 1,601 Posts
Originally Posted by ob2s View Post
Is it possible to remove a hanger and fashion a way of mounting it to a simplex dropout ? Would I have to 'make' an adapter ? It is clearly a nut vs bolt situation. Thanks

This has some good info (read down until you get to Simplex rear drop out):

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

Here is a thread you may find useful:

Derailleurs that fit Simplex Dropouts?
bikemig is offline  
Old 07-20-22, 01:04 PM
  #5  
ob2s
Junior Member
Thread Starter
 
ob2s's Avatar
 
Join Date: Nov 2013
Location: SW Portland Ore
Posts: 84

Bikes: 1964 TdF Peugeot PX-10 / 1988 Peugeot Comete (NOS)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked 4 Times in 3 Posts
Originally Posted by gugie View Post
What is it you're trying to accomplish? Are you trying to use a derailleur that works with the Simplex unthreaded dropout? Are these pictures from your bike, or something you found on the internet?

I do a lot of frame modifications for others, I'm not sure what you want.
Thank for the replies. The 3rd photo is the simplex derailleur from the 70s that was mounted in the simplex dropout hole on a 64 Peugeot PX-10. The one in the first photo is the period correct derailleur, but I can't find one that does NOT have a hanger on it. The 1st photo obviously has a bolt with a hex head to mount it into the drop out. The 3rd derailleur has a nut that holds the hanger on. I can't just remove the hanger and bolt it in the drop out because there wouldn't be a tab to hold it in the correct position. I WOULD just try it, but I haven't bought the period correct derailleur yet as it is expensive and didn't want to be stuck trying to resell it forever. thanks

Last edited by ob2s; 07-20-22 at 02:13 PM.
ob2s is offline  
Old 07-20-22, 03:48 PM
  #6  
3alarmer 
Friendship is Magic
 
3alarmer's Avatar
 
Join Date: Nov 2010
Location: The Big Tomato
Posts: 21,315

Bikes: old ones

Mentioned: 296 Post(s)
Tagged: 0 Thread(s)
Quoted: 24248 Post(s)
Liked 7,937 Times in 5,566 Posts
Originally Posted by ob2s View Post
Thank for the replies. The 3rd photo is the simplex derailleur from the 70s that was mounted in the simplex dropout hole on a 64 Peugeot PX-10. The one in the first photo is the period correct derailleur, but I can't find one that does NOT have a hanger on it. The 1st photo obviously has a bolt with a hex head to mount it into the drop out. The 3rd derailleur has a nut that holds the hanger on. I can't just remove the hanger and bolt it in the drop out because there wouldn't be a tab to hold it in the correct position. I WOULD just try it, but I haven't bought the period correct derailleur yet as it is expensive and didn't want to be stuck trying to resell it forever. thanks
...1964 is from the period right after Simplex went all plastic. I'm guessing the reason that period correct ones are expensive is that most of them have by now come to grief. The Prestige did not change all that much over the years, in terms of the overall look of them. You can see examples over the years at the Disraeli Gears site at this link. What I do, personally, is just go with some miscellaneous Prestige rear derailleur, if I want to go all Simplex. They are readily available in the used parts stream, although a lot of them have the stop cage for the upper pivot spring twisted loose, which is a difficult repair.

The other alternative that works well, but is not period correct for the early 60's, is some version of a Shimano Crane (either long cage or short cage.)

AFAIK you are correct, in that there is no way to easily convert one of those Simplex rear mechanisms from the integral hanger sort, to the kind that bolts onto a Competition dropout from the inside, like you have there. I have a few I have repaired, for my own use, but they are not authentic, period correct for 1964. Let me know if you want me to look for them, and send you photos. Mine are all more recent in year of manufacture, but they all look the same to me.
__________________
3alarmer is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.