Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Rear derailleur mount point

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Rear derailleur mount point

Old 04-08-12, 08:11 AM
  #1  
yannis
Member
Thread Starter
 
Join Date: Feb 2012
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Rear derailleur mount point

I own a vintage Peugeot bicycle. The frame has no rear derailleur hanger. The dropouts are like these. The installed derailleur, an old simplex, has a hanger. The problem is that the frame has no hole for the bold that holds the derailleur in place either. This bold is installed inside the dropout, behind the wheel axle and that leaves a gap on the other side's dropout. I think that it's not safe to have the wheel installed this way... It is also difficult to adjust. How could I mount the rear derailleur elseway? Is there any special hanger for such a situation? Thanks in advance!
yannis is offline  
Old 04-08-12, 08:55 AM
  #2  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 15,479

Bikes: RANS V3 ti, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 465 Post(s)
Liked 19 Times in 19 Posts
Rear derailleur adapter claw.
http://harriscyclery.net/product/var...r-claw-963.htm

There will be a gap on the non-drive side.
__________________
RANS V3 Ti, RANS V-Rex, RANS Screamer
JanMM is offline  
Old 04-08-12, 08:57 AM
  #3  
Grand Bois
Senior Member
 
Grand Bois's Avatar
 
Join Date: Mar 2005
Location: Pinole, CA, USA
Posts: 17,421
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 428 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Older French bikes use spacers behind the axle. Yours should have one on the non-drive side. You can find them online. Mine has an integral hanger, so it has them on both sides. There's nothing unsafe about not having them. They're just a convenience.

The word you want is bolt.

Grand Bois is offline  
Old 04-08-12, 09:01 AM
  #4  
yannis
Member
Thread Starter
 
Join Date: Feb 2012
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Rear derailleur adapter claw.
http://harriscyclery.net/product/var...r-claw-963.htm

There will be a gap on the non-drive side.

I already have such a hanger. I just don't know if and how could I install it without leaving the gap on the non-drive side...
yannis is offline  
Old 04-08-12, 09:27 AM
  #5  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 15,479

Bikes: RANS V3 ti, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 465 Post(s)
Liked 19 Times in 19 Posts
From the Harris site:
"The bolt and its special shoulder nut fit in the back of the axle slot. When normally installed, the left end of the wheel's axle will wind up near the middle of its axle slot.

This is normal. There are millions of bikes on the road using this system."

I prefer vertical dropouts but rode thousands of miles on bikes with a gap.

There have been other spacer devices available such as described by Grand Bois.
__________________
RANS V3 Ti, RANS V-Rex, RANS Screamer
JanMM is offline  
Old 04-08-12, 09:55 AM
  #6  
catmandew52
Senior Member
 
catmandew52's Avatar
 
Join Date: Jul 2011
Location: S. E. Michigan
Posts: 517
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by yannis View Post
I already have such a hanger. I just don't know if and how could I install it without leaving the gap on the non-drive side...
Hundreds of thousands early 10 speeds were sold, and ridden, with a claw type derailieur hanger clamped in the drive side dropout, and, NO SPACERS, PLUGS, ADJUSTING SCREWS, NOTHING!, in the non drive side.
Pull the wheel back into the claw hanger, snug up the drive side axle nut. Snug up the non drive side nut. Make sure your wheel is centered, and tighten both nuts. Not a big thing, really.
There will be a gap on the non drive side,but it doesn't hurt anything.
catmandew52 is offline  
Old 04-08-12, 11:28 AM
  #7  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 20,407

Bikes: Several, mostly not name brands.

Mentioned: 109 Post(s)
Tagged: 0 Thread(s)
Quoted: 1686 Post(s)
Liked 56 Times in 38 Posts
Originally Posted by yannis View Post
I already have such a hanger. I just don't know if and how could I install it without leaving the gap on the non-drive side...
Don't worry about the gap on the non-drive side; it doesn't matter.
JohnDThompson is online now  
Old 04-08-12, 09:04 PM
  #8  
neurocop
Senior Member
 
Join Date: Oct 2011
Location: SF Bay Area
Posts: 428

Bikes: 2003 Lemond Zurich; 1987 Schwinn Tempo; 1968 PX10; 1978 PX10LE, Peugeot Course; A-D Vent Noir

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by JohnDThompson View Post
Don't worry about the gap on the non-drive side; it doesn't matter.
The claw hanger will leave a small gap on the non-drive side DO when the axle is in place. It's OK if you can lock your axle in place so that the wheel is centered, but you need to make sure the axle stays there and doesn't drift backwards into the non-drive side DO. The surest way to do this is to use solid bolts rather than quick-release skewers. The best solution when using QR skewers is to have the DO's drilled for screws that set the axle in the proper position. Standardized spacers will also work, but you'd have to offset them differently and srew them solidly in place to account to the space taken up by the claw.
neurocop is offline  
Old 04-09-12, 06:39 AM
  #9  
yannis
Member
Thread Starter
 
Join Date: Feb 2012
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Another solution could be to attach an identical derailleur hanger on the other side.
yannis is offline  
Old 04-09-12, 08:25 AM
  #10  
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 7,927

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 376 Post(s)
Liked 15 Times in 12 Posts
Originally Posted by yannis View Post
I already have such a hanger. I just don't know if and how could I install it without leaving the gap on the non-drive side...
Myself, I'd be tempted to either cut and braze the claw onto the dropout to create an integral hanger or just throw the frame away. Yuk.

Or if you prefer to ignore the aesthetic travesty and would rather spend effort solving the tiny issue of your gap, you could grind off the pressed bit of the claw that sits inside the dropout, and drill and tap a hole behind the slot allowing you to mount the wheel all the way back in the slot. Which would weaken the dropout and still look fugly.
Kimmo is online now  
Old 04-09-12, 05:57 PM
  #11  
neurocop
Senior Member
 
Join Date: Oct 2011
Location: SF Bay Area
Posts: 428

Bikes: 2003 Lemond Zurich; 1987 Schwinn Tempo; 1968 PX10; 1978 PX10LE, Peugeot Course; A-D Vent Noir

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by yannis View Post
Another solution could be to attach an identical derailleur hanger on the other side.
I think the problem with that solution is that the claws are shaped to fit on the drive side DO. You'd have to do some machining
to get one to fit on the non-drive DO.
neurocop is offline  
Old 04-10-12, 02:32 AM
  #12  
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 7,927

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 376 Post(s)
Liked 15 Times in 12 Posts
Not if you bung it on upside-down.
Kimmo is online now  
Old 04-10-12, 11:04 AM
  #13  
yannis
Member
Thread Starter
 
Join Date: Feb 2012
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I am trying to find a way to mount the hunger without using the screw. That way it could be placed without leaving that gap on the other side.
yannis is offline  
Old 11-27-18, 01:08 PM
  #14  
Terfer
Newbie
 
Join Date: Nov 2018
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by neurocop View Post
I think the problem with that solution is that the claws are shaped to fit on the drive side DO. You'd have to do some machining
to get one to fit on the non-drive DO.
I use that solution for around 1 full year (bad weather , bumpy road and more) and working nice but i do one mod for my not drive side i just cut the dropout part so i just get a spacer.
Terfer is offline  
Old 11-27-18, 01:22 PM
  #15  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,928

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6830 Post(s)
Likes: 0
Liked 210 Times in 175 Posts
To much pre worrying

Originally Posted by yannis View Post
I already have such a hanger. I just don't know if and how could I install it without leaving the gap on the non-drive side...
It does not matter,, you are not in a race..
center the wheel, tighten the axle, how ever it may be fixed QR or Nut.
fietsbob is offline  
Old 11-27-18, 04:37 PM
  #16  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,510

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 477 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Terfer View Post
I use that solution for around 1 full year (bad weather , bumpy road and more) and working nice but i do one mod for my not drive side i just cut the dropout part so i just get a spacer.
That gap is absolutely nothing but an aesthetic issue. There is no force on the wheel that will push it backward. The only purpose of putting something on the left side is to make it quicker to mount the wheel centered in the dropouts, mainly when using a quick release. with a bolt-on hub you just tighten the drive side, center the wheel between the stays and then tighten the other side.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline  
Old 11-27-18, 06:15 PM
  #17  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,652

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1728 Post(s)
Likes: 0
Liked 45 Times in 32 Posts
Originally Posted by yannis View Post
I am trying to find a way to mount the hunger without using the screw. That way it could be placed without leaving that gap on the other side.
Grind off the nub that the hanger plate has on it's inside (and is meant to reside within the slot to better position everything) then drill a hole in the drop out's weakest point for that bolt. I've seen this done by the few who seek symmetry in their life. (Or some reason that has nothing to do with how bikes actually work). Andy (who hope all can understand the tongue in cheek that this suggestion is meant in)
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 11-27-18, 08:39 PM
  #18  
nfmisso
Nigel
 
nfmisso's Avatar
 
Join Date: Mar 2011
Location: San Jose, CA
Posts: 3,010

Bikes: 1980s and 1990s steel: CyclePro, Nishiki, Schwinn, SR, Trek........

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 381 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by Kimmo View Post
Not if you bung it on upside-down.
been there, done that, works great if the frame is square. Some frames are not that good......

Here is another choice:
https://www.amazon.com/dp/B079HLJ2BT

cut off the hanger part for use on the NDS side.
nfmisso is offline  
Old 11-27-18, 09:21 PM
  #19  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 15,479

Bikes: RANS V3 ti, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 465 Post(s)
Liked 19 Times in 19 Posts
Zombie Thread alert. Had been asleep 6 years until 2:08pm this afternoon.
__________________
RANS V3 Ti, RANS V-Rex, RANS Screamer
JanMM is offline  
Old 11-29-18, 05:13 AM
  #20  
jj1091 
Mike J
 
Join Date: Nov 2013
Location: Jacksonville Florida
Posts: 1,611

Bikes: 1975 Peugeot PX-50L, 1971 Peugeot PX-10, 1974 Peugeot PX-8

Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 391 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by JanMM View Post
Zombie Thread alert. Had been asleep 6 years until 2:08pm this afternoon.
Hey, it's Terfer's 1st post. And, already he's telling someone to cut off something.
jj1091 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
TommyBing
Road Cycling
54
07-17-13 11:46 AM
blilrat
Classic & Vintage
0
01-11-12 01:48 PM
5kdad
General Cycling Discussion
0
12-03-08 10:19 PM
pointyhead
Road Cycling
36
09-08-03 12:07 PM

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.