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

Front Derailleur Woes Cannondale!

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.

Front Derailleur Woes Cannondale!

Old 01-08-21, 01:51 PM
  #1  
embankmentlb
Senior Member
Thread Starter
 
embankmentlb's Avatar
 
Join Date: May 2008
Location: North, Ga.
Posts: 2,147

Bikes: 3Rensho-Aerodynamics, Bernard Hinault Look - 1986 tour winner, Guerciotti, Various Klein's & Panasonic's

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Liked 87 Times in 45 Posts
Front Derailleur Woes Cannondale!

This is a problem I did not expect when attempting to replace this Campy front mech with a Suntour Cyclone. I picked the Suntour mech up on eBay and it came off a Cannondale, like the bike l am working o and even has the C’Dale bolt on adapter. I expected it to be a simple bolt on switch. The problem however is that the cage of the Suntour is at an odd angle to the chain wheel. That is, it does not follow the circumference of the chainring. Please imagine it were installed. The mech would need to be say 25mm above the top of the chainring in order to just clear the rear edge of the chainring.
As you can see, the existing Campy mech lines up perfectly.
I have never run into this before.
What do you think?



Last edited by embankmentlb; 01-08-21 at 02:15 PM.
embankmentlb is offline  
Old 01-08-21, 01:58 PM
  #2  
embankmentlb
Senior Member
Thread Starter
 
embankmentlb's Avatar
 
Join Date: May 2008
Location: North, Ga.
Posts: 2,147

Bikes: 3Rensho-Aerodynamics, Bernard Hinault Look - 1986 tour winner, Guerciotti, Various Klein's & Panasonic's

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Liked 87 Times in 45 Posts

The mounting point of the Suntour is at a completely different angle making it impossible to mount correctly.
embankmentlb is offline  
Old 01-08-21, 02:00 PM
  #3  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 9,260

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: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 2705 Post(s)
Likes: 0
Liked 1,159 Times in 794 Posts
Have you actually taken the Campy off and tried to put the Cyclone one? Any clues that the Cyclone might have been tweaked in (say) a deraillment?
79pmooney is online now  
Old 01-08-21, 02:10 PM
  #4  
thook
Senior Member
 
Join Date: Aug 2009
Location: Winslow, AR
Posts: 1,574

Bikes: '83 univega gran turismo x2, '85 schwinn super le tour,'89 miyata triple cross, '91 GT tequesta, '90 yokota grizzly peak, '94 GT backwoods, '95'ish scott tampico, '98 bonty privateer, '93 mongoose crossway 625, '98 parkpre ariel, 2k'ish giant fcr3

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 332 Post(s)
Liked 193 Times in 146 Posts
i'd take the cable loose, unbolt the campy, and slide it back on the chain. then, drop the chain off the inner ring and actually mount the cyclone for a test fit. a mock up is not a good way to do this
thook is online now  
Old 01-08-21, 02:22 PM
  #5  
embankmentlb
Senior Member
Thread Starter
 
embankmentlb's Avatar
 
Join Date: May 2008
Location: North, Ga.
Posts: 2,147

Bikes: 3Rensho-Aerodynamics, Bernard Hinault Look - 1986 tour winner, Guerciotti, Various Klein's & Panasonic's

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Liked 87 Times in 45 Posts
I did mount the Suntour mech but it was not going to fit. I even attempted to shim the bolt on hanger as it bolts to the frame. That put the mech in the ballpark. It however was an unstable an mess. No photos.
Could this derailleur be made for an off road crankset? I assumed all Cyclone parts were road.
embankmentlb is offline  
Old 01-08-21, 02:41 PM
  #6  
thook
Senior Member
 
Join Date: Aug 2009
Location: Winslow, AR
Posts: 1,574

Bikes: '83 univega gran turismo x2, '85 schwinn super le tour,'89 miyata triple cross, '91 GT tequesta, '90 yokota grizzly peak, '94 GT backwoods, '95'ish scott tampico, '98 bonty privateer, '93 mongoose crossway 625, '98 parkpre ariel, 2k'ish giant fcr3

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 332 Post(s)
Liked 193 Times in 146 Posts
there was a period they were used on early mtb's, but didn't last long before mountech, etc was produced. at any rate, the cyclone mtb's were using 50t or 48t large rings, so i can't why you're having the issue. that looks to be the same cyclone model as on my '85 super le tour that drives a 52t large ring
thook is online now  
Old 01-08-21, 03:04 PM
  #7  
KCT1986
Senior Member
 
Join Date: Jan 2016
Posts: 162
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 22 Times in 18 Posts
Looks like it is altered/damaged. The upper riveted pivot axle on the link arm looks bent or loose. The front part of the rivet looks like it's not flush.

The link arm (with the rectangular cut-out) should be more parallel with the braze-on mount.
KCT1986 is offline  
Old 01-08-21, 03:52 PM
  #8  
embankmentlb
Senior Member
Thread Starter
 
embankmentlb's Avatar
 
Join Date: May 2008
Location: North, Ga.
Posts: 2,147

Bikes: 3Rensho-Aerodynamics, Bernard Hinault Look - 1986 tour winner, Guerciotti, Various Klein's & Panasonic's

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 63 Post(s)
Liked 87 Times in 45 Posts
Originally Posted by KCT1986 View Post
Looks like it is altered/damaged. The upper riveted pivot axle on the link arm looks bent or loose. The front part of the rivet looks like it's not flush.

The link arm (with the rectangular cut-out) should be more parallel with the braze-on mount.
I think you are correct ☹️
embankmentlb 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 © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.