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

Modern replacement for vintage derailluer?

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.

Modern replacement for vintage derailluer?

Old 08-02-20, 11:29 AM
  #1  
mmcc73
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 135
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked 7 Times in 3 Posts
Modern replacement for vintage derailluer?

Hi All - today my Suntour GT derailleur on my Dawes Galaxy got all sorts of bent up. I'm supposed to go on a week long bikepacking trip next week with the bike in question, and rather than try to straighten this thing out I'd like to replace it with something newer. Unfortunately, I don't know much about modern derailluers, so I'm looking for a recommendation.

- Robustness would be valued over lightness
- Needs to work with friction shifters - Suntour barcons specifically
- Needs to work with a 5 speed cassette
- Available with Amazon Prime shipping would be great

Would something like this Altus mountain bike derailluer work? Could I use my existing hanger with it?
https://www.amazon.com/Shimano-RDM31...dp/B000FFGTK0/

Other suggestions would be gratefully welcomed.

mmcc73 is offline  
Old 08-02-20, 11:52 AM
  #2  
nlerner
Senior Member
 
Join Date: Dec 2005
Posts: 13,264
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 1676 Post(s)
Liked 813 Times in 462 Posts
I would guess that Altus would likely work as 5-speed friction shifting isn’t asking much. You would have to deal with transferring or finding a hanger claw as your bike does not have a brazed-on RD hanger, and you’ll also need a chain tool to remove the old RD.
nlerner is offline  
Old 08-02-20, 11:55 AM
  #3  
bikemig 
Senior Member
 
bikemig's Avatar
 
Join Date: Apr 2012
Location: Middle Earth (aka IA)
Posts: 17,327

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

Mentioned: 140 Post(s)
Tagged: 0 Thread(s)
Quoted: 4623 Post(s)
Liked 1,002 Times in 686 Posts
You'll need a hanger as well

https://www.amazon.com/Shimano-Compa...g-goods&sr=1-3
bikemig is offline  
Old 08-02-20, 11:59 AM
  #4  
sheddle
Senior Member
 
Join Date: Oct 2008
Location: Seattle
Posts: 1,177

Bikes: 1981 De Rosa Professional, 1988 Schwinn Project KOM-10, 1984 Univega Competizione

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 332 Post(s)
Liked 410 Times in 249 Posts
That RD is a good one for your purposes. Massive capacity, and while not light, has a reputation for being solid.
sheddle is offline  
Old 08-02-20, 12:01 PM
  #5  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 8,666

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
Quoted: 2397 Post(s)
Likes: 0
Liked 839 Times in 566 Posts
That derailleur may be salvageable. It looks like the hanger is rotated up. If you loosen the quick release and straighten the hanger to align with the dropout, does the derailleur now line up and work properly?
79pmooney is online now  
Old 08-02-20, 12:07 PM
  #6  
canopus 
Senior Member
 
canopus's Avatar
 
Join Date: Mar 2009
Location: Kingwood, TX
Posts: 1,351

Bikes: 1985 Cannondale SR300, 1985 Cannondale ST400, 1984 Trek 760, 1984 Trek 610, 1984 Trek 720, 1981 Trek 710, 1979 Trek 710, Gary Littlejohn Cruiser, BMX

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 50 Times in 38 Posts
You could probably get anything (new, old, used) in a middle or long cage and it would work fine for 5s friction shifting. Chances are real good you could reuse the hanger you have there on your suntour. Just check it to make sure it isn't bent and that it is threaded then just remove the suntour and install the new one.
__________________
1984 Cannondale ST
1985 Cannondale SR300
1980 Gary Littlejohn Cruiser
1984 Trek 760
1981 Trek 710
Pics
canopus is offline  
Old 08-02-20, 12:10 PM
  #7  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 8,666

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 100 Post(s)
Tagged: 0 Thread(s)
Quoted: 2397 Post(s)
Likes: 0
Liked 839 Times in 566 Posts
The good thing is that every derailleur works with friction shifters! Only questions are - does the shifter pull enough cable? If the shifter pulls a lot, do you have the manual dexterity to select the cog you want?

In a pinch, you can run a derailleur that takes too my cable pull and simply not be able to get into low (or tighten the cable so you no longer have high). Derailleurts with fricton shifting are very forgiving, Nothing bad is going to happen.

I love friction shifters. I use downtube shifters since I don't tour and don't have the loaded bike shifts to make and I know how.. Love em' a little more every time I change a derailleur.
79pmooney is online now  
Old 08-02-20, 12:19 PM
  #8  
ryansu 
Ride.Smile.Repeat
 
ryansu's Avatar
 
Join Date: May 2011
Location: Seattle WA
Posts: 2,800

Bikes: 2009 Handsome Devil, 1987 Trek 520 Cirrus, 1978 Motobecane Grand Touring, 1987 Nishiki Cresta GT, 1989 Specialized Allez Former bikes; 1986 Miyata Trail Runner, 1979 Miyata 912, 2011 VO Rando, 1999 Cannondale R800, 1986 Schwinn Passage

Mentioned: 71 Post(s)
Tagged: 0 Thread(s)
Quoted: 754 Post(s)
Liked 438 Times in 326 Posts
I have had good luck with the SunRace RD M10 rear. Its cheap and looks the vintage part and comes in a Claw hanger option but I see Amazon is currently out. Ebay might have them
ryansu is online now  
Old 08-02-20, 12:53 PM
  #9  
mmcc73
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 135
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked 7 Times in 3 Posts
Thanks, all. I pulled the trigger on that Altus derailleur and a new hanger. Old derailleur is already off, and my chain is having a nice bath in the ultrasonic cleaner.
mmcc73 is offline  
Old 08-02-20, 12:58 PM
  #10  
SurferRosa
SeŮor Member
 
SurferRosa's Avatar
 
Join Date: Dec 2018
Location: Pac NW
Posts: 2,969

Bikes: Old school lightweights

Mentioned: 45 Post(s)
Tagged: 0 Thread(s)
Quoted: 1220 Post(s)
Liked 965 Times in 596 Posts
That cage is steel, isn't it? If it's bent, you find out the reason it got bent and try not to do that again. Then you bend it back in place.

#steel_is_real ... bendable
SurferRosa is offline  
Old 08-02-20, 01:30 PM
  #11  
mmcc73
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 135
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked 7 Times in 3 Posts
Originally Posted by SurferRosa View Post
That cage is steel, isn't it? If it's bent, you find out the reason it got bent and try not to do that again. Then you bend it back in place.

#steel_is_real ... bendable
I get it but this particular derailleur has had a couple other bendings in the past, and Iím not feeling super confident in getting it properly straight and working well for my upcoming trip.
mmcc73 is offline  
Old 08-02-20, 01:35 PM
  #12  
SurferRosa
SeŮor Member
 
SurferRosa's Avatar
 
Join Date: Dec 2018
Location: Pac NW
Posts: 2,969

Bikes: Old school lightweights

Mentioned: 45 Post(s)
Tagged: 0 Thread(s)
Quoted: 1220 Post(s)
Liked 965 Times in 596 Posts
Originally Posted by mmcc73 View Post
this particular derailleur has had a couple other bendings in the past.
That doesn't make sense. Steel doesn't bend on its own. It takes a lot of force. Usually when this happens, other stuff breaks, like spokes.
SurferRosa is offline  
Old 08-02-20, 01:42 PM
  #13  
mmcc73
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 135
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked 7 Times in 3 Posts
Originally Posted by SurferRosa View Post
That doesn't make sense. Steel doesn't bend on its own. It takes a lot of force. Usually when this happens, other stuff breaks, like spokes.
When I got the bike it was bent. When the bike fell over last year while loaded with full panniers, it got bent again. Today it got bent for an unknown reason - maybe caught it on something when getting the bike off a hook on the wall. In any event at this point the pulleys arenít coplanar and the cage ainít looking good.
mmcc73 is offline  
Likes For mmcc73:
Old 08-02-20, 05:24 PM
  #14  
The Golden Boy 
Extraordinary Magnitude
 
The Golden Boy's Avatar
 
Join Date: Aug 2009
Location: Waukesha WI
Posts: 12,272

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 2068 Post(s)
Liked 422 Times in 284 Posts
I totally understand wanting to get something now- with as little fuss as possible to feel good about getting under way with the tour.

The last thing you want is to doubt your equipment. You need confidence your stuff isn't going to fail.

But I would suggest when you get back- a Suntour V-GT Luxe should be in your future.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jiggliní huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Likes For The Golden Boy:
Old 08-02-20, 05:33 PM
  #15  
Salamandrine 
Senior Member
 
Join Date: Oct 2015
Location: Los Angeles
Posts: 6,192

Bikes: 78 Masi Criterium, 68 PX10, 2016 Mercian King of Mercia, Rivendell Clem Smith Jr

Mentioned: 118 Post(s)
Tagged: 0 Thread(s)
Quoted: 2267 Post(s)
Liked 500 Times in 363 Posts
The Altus should work great. Besides, it's Grant Petersen approved.

I hope the current chain is long enough.
Salamandrine is offline  
Likes For Salamandrine:
Old 08-02-20, 07:30 PM
  #16  
mmcc73
Senior Member
Thread Starter
 
Join Date: Apr 2013
Posts: 135
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Liked 7 Times in 3 Posts
Originally Posted by Salamandrine View Post
The Altus should work great. Besides, it's Grant Petersen approved.

I hope the current chain is long enough.
Thanks for pointing that out- I didnít realize it took up so much chain. Iíll order a new one just to be safe.
mmcc73 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 © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.