Installing Rear Simplex Derailleur on 1980 Peugeot Super Sport
09-01-21, 03:39 PM
#1
Newbie
Thread Starter
Join Date: Sep 2021
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Installing Rear Simplex Derailleur on 1980 Peugeot Super Sport
Hi Bike Forum community,
I am a novice so apologies in advance if this is a dumb question. But can anyone provide guidance on how to properly attach a rear Simplex derailleur. When I attempt to attach the derailleur hanger onto the frame, the derailleur rests at an awkward angle. Is there supposed to be a nut or washer between the hanger and rear mount?
I am a novice so apologies in advance if this is a dumb question. But can anyone provide guidance on how to properly attach a rear Simplex derailleur. When I attempt to attach the derailleur hanger onto the frame, the derailleur rests at an awkward angle. Is there supposed to be a nut or washer between the hanger and rear mount?
09-01-21, 04:09 PM
#2
Senior Member
Join Date: Feb 2020
Posts: 2,819
Mentioned: 49 Post(s)
Tagged: 0 Thread(s)
Quoted: 1106 Post(s)
Likes: 0
Liked 1,327 Times
in
783 Posts
We'll probably need a picture, but I'll take a guess and ask if
a) the frame has a right rear dropout with an integral hanger for a derailleur
b) the derailleur has a thing called a claw, which is a stamped bit of steel plate with a slot in it at the top to match the dropout slot.
Because if yes to both you can't use that derailleur on the frame without modification to at least one; the claw has an offset part which will not allow it to sit flush against a dropout-hanger.
a) the frame has a right rear dropout with an integral hanger for a derailleur
b) the derailleur has a thing called a claw, which is a stamped bit of steel plate with a slot in it at the top to match the dropout slot.
Because if yes to both you can't use that derailleur on the frame without modification to at least one; the claw has an offset part which will not allow it to sit flush against a dropout-hanger.
09-01-21, 04:30 PM
#3
Senior Member
You should also state the derailleur model. Some Simplex derailleurs attach with a bolt screwed in from the back side.
Any chance the derailleur was disassembled and reassembled with the spring in wrong?
Any chance the derailleur was disassembled and reassembled with the spring in wrong?
09-01-21, 08:49 PM
#5
Friendship is Magic
Join Date: Nov 2010
Location: Sacramento, CA
Posts: 22,984
Bikes: old ones
Mentioned: 304 Post(s)
Tagged: 0 Thread(s)
Quoted: 26410 Post(s)
Liked 10,376 Times
in
7,204 Posts
.
...if you decide to look for an older Simplex derailleur, that is designed to be used with a dropout like yours, with the integral hanger, be forewarned.
Many of these have been broken over the years by someone trying to dismount them by inserting a hex wrench in the exterior (outside) socket, rather than the interior one for the mounting bolt.
What happens is that the upper pivot tension spring stop gets bent or broken, the upper spring immediately de-tensions, and the derailleur will sort of still work, but not well.
Many of the people selling them on ebay do not appreciate this mechanical idiosyncrasy. So be careful what you buy, and inspect whatever you receive.
I don't think you can simply dismount the one you have from its hanger. But if you post photos of it front and back, someone can tell you if it's possible.
...if you decide to look for an older Simplex derailleur, that is designed to be used with a dropout like yours, with the integral hanger, be forewarned.
Many of these have been broken over the years by someone trying to dismount them by inserting a hex wrench in the exterior (outside) socket, rather than the interior one for the mounting bolt.
What happens is that the upper pivot tension spring stop gets bent or broken, the upper spring immediately de-tensions, and the derailleur will sort of still work, but not well.
Many of the people selling them on ebay do not appreciate this mechanical idiosyncrasy. So be careful what you buy, and inspect whatever you receive.
I don't think you can simply dismount the one you have from its hanger. But if you post photos of it front and back, someone can tell you if it's possible.
09-01-21, 11:11 PM
#6
verktyg
Join Date: Jul 2006
Location: SF Bay Area
Posts: 4,030
Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1980s DeRosa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1988 Colnago Technos, 1985 RalieghUSA SBDU Team Pro
Mentioned: 207 Post(s)
Tagged: 0 Thread(s)
Quoted: 1036 Post(s)
Liked 1,238 Times
in
654 Posts
1980 Peugeot Super Sport Demi-Course
1980 Peugeot Super Sport Demi-Course
https://steel-vintage.com/peugeot-su...ke-1980-detail
Simplex SX 810 with a "claw hanger" mount
Those Simplex derailleurs with a claw mount can't be converted to a direct mount that screws onto a dropout with a threaded hanger without replacing some un-obtainium hardware...
In reference to 3alarmer above:
The upper pivot spring # 3883 could break from mishandling by a hammersmith, or just plain fatigue. That spring is what keeps the upper pulley and chain up against the bottom of the freewheel. When they break, the derailleur sags downward.
Dredging up all of this old Simplex stuff (without pay) is seriously taxing my memory!
verktyg
https://steel-vintage.com/peugeot-su...ke-1980-detail
Simplex SX 810 with a "claw hanger" mount
Those Simplex derailleurs with a claw mount can't be converted to a direct mount that screws onto a dropout with a threaded hanger without replacing some un-obtainium hardware...
In reference to 3alarmer above:
The upper pivot spring # 3883 could break from mishandling by a hammersmith, or just plain fatigue. That spring is what keeps the upper pulley and chain up against the bottom of the freewheel. When they break, the derailleur sags downward.
Dredging up all of this old Simplex stuff (without pay) is seriously taxing my memory!
verktyg
__________________
Don't believe everything you think! History is written by those who weren't there....
Chas. ;-)
Don't believe everything you think! History is written by those who weren't there....
Chas. ;-)
Likes For verktyg:
09-02-21, 06:49 AM
#7
Senior Member
Join Date: Feb 2020
Posts: 2,819
Mentioned: 49 Post(s)
Tagged: 0 Thread(s)
Quoted: 1106 Post(s)
Likes: 0
Liked 1,327 Times
in
783 Posts
.
...if you decide to look for an older Simplex derailleur, that is designed to be used with a dropout like yours, with the integral hanger, be forewarned.
Many of these have been broken over the years by someone trying to dismount them by inserting a hex wrench in the exterior (outside) socket, rather than the interior one for the mounting bolt.
What happens is that the upper pivot tension spring stop gets bent or broken, the upper spring immediately de-tensions, and the derailleur will sort of still work, but not well.
Many of the people selling them on ebay do not appreciate this mechanical idiosyncrasy. So be careful what you buy, and inspect whatever you receive.
I don't think you can simply dismount the one you have from its hanger. But if you post photos of it front and back, someone can tell you if it's possible.
...if you decide to look for an older Simplex derailleur, that is designed to be used with a dropout like yours, with the integral hanger, be forewarned.
Many of these have been broken over the years by someone trying to dismount them by inserting a hex wrench in the exterior (outside) socket, rather than the interior one for the mounting bolt.
What happens is that the upper pivot tension spring stop gets bent or broken, the upper spring immediately de-tensions, and the derailleur will sort of still work, but not well.
Many of the people selling them on ebay do not appreciate this mechanical idiosyncrasy. So be careful what you buy, and inspect whatever you receive.
I don't think you can simply dismount the one you have from its hanger. But if you post photos of it front and back, someone can tell you if it's possible.
Last edited by oneclick; 09-02-21 at 06:53 AM.
