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

Front derailleur shift problems

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.

Front derailleur shift problems

Old 09-23-08, 08:06 AM
  #1  
Highwheel
Junior Member
Thread Starter
 
Join Date: Dec 2007
Location: Batavia Illinois
Posts: 16

Bikes: Steel, carbon, titanium, and lots of turn-of-the-century stuff

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Front derailleur shift problems

I have an old but wonderful Specialized Expedition touring road bike. It has a 10sp rear cassette with end shifters and an Ultegra triple crank, bottom bracket and derailleurs. I wanted the bottom bracket and crank for a different bike so I swapped it out and put on an FSA (118mm) bb and crank that had been on a Concorde road bike. On the Concorde, the front derailleur shifted perfectly. Now that the FSA crank is on the Specialized, the front derailleur just can't seem to push the chain over far enough to go onto the outside gear. So, I bought a 113mm bottom bracket and tried that. Same problem. I have the adjustment screw out far enough and the cable is tight when on the lower gear. What do I do now?
Thanks,
Highwheel
Highwheel is offline  
Old 09-23-08, 10:22 AM
  #2  
ogbigbird
Senior Member
 
Join Date: Sep 2008
Location: yreka, ca
Posts: 542

Bikes: like 15. my favorite a 1951 schwinn spitfire cruiser. also have a 1959 amf roadmaster, 1962 jch deluxe cruiser among others.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
if your deraillur is maxed out on its limitation settings, you may need to just bite the bullit and find a front deraillur with tripple range capasity. did you reset the low limiter screw, backing off it a bit to try to "open up" a little more range? if that does work you may need to reajust your shifting wire and other details, but a triple range deraillur would be the best.
ogbigbird is offline  
Old 09-23-08, 10:47 AM
  #3  
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Posts: 6,926

Bikes: 03 Raleigh Professional (steel)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What's the chainline of your current crankset?
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline  
Old 09-23-08, 02:14 PM
  #4  
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Was the shifter in its lowest position when the cable was attached to the front derailleur?
Al1943 is offline  
Old 09-29-08, 11:50 AM
  #5  
Highwheel
Junior Member
Thread Starter
 
Join Date: Dec 2007
Location: Batavia Illinois
Posts: 16

Bikes: Steel, carbon, titanium, and lots of turn-of-the-century stuff

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Answer to problem

I took the bike into the LBS and we tweaked on the derailleur for about 20 minutes. The answer the problem is to NOT follow Shimano's convention of having the outside cage plate of the derailleur just 2mm off of the out chain ring. It must be higher - around 7-8mm. Doing so allows the inner chain plate to pass over the middle chain ring. Otherwise it just won't get by it. It shifts as good as any of my other bikes now.
Cheers
Highwheel
Highwheel is offline  
Old 09-29-08, 11:50 AM
  #6  
Highwheel
Junior Member
Thread Starter
 
Join Date: Dec 2007
Location: Batavia Illinois
Posts: 16

Bikes: Steel, carbon, titanium, and lots of turn-of-the-century stuff

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Answer to problem

I took the bike into the LBS and we tweaked on the derailleur for about 20 minutes. The answer to the problem is to NOT follow Shimano's convention of having the outside cage plate of the derailleur just 2mm off of the outside chain ring. It must be higher - around 7-8mm. Doing so allows the inner chain plate to pass over the middle chain ring. Otherwise it just won't get by it. It shifts as good as any of my other bikes now.
Cheers
Highwheel
Highwheel is offline  
Old 09-29-08, 11:59 AM
  #7  
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Highwheel View Post
The answer the problem is to NOT follow Shimano's convention of having the outside cage plate of the derailleur just 2mm off of the out chain ring. It must be higher - around 7-8mm. Doing so allows the inner chain plate to pass over the middle chain ring. Otherwise it just won't get by it. It shifts as good as any of my other bikes now.
Highwheel
I think this depends on the actual size of the chainrings and the size that the derailleur was designed for.

Al
Al1943 is offline  
Old 10-01-08, 06:41 AM
  #8  
Highwheel
Junior Member
Thread Starter
 
Join Date: Dec 2007
Location: Batavia Illinois
Posts: 16

Bikes: Steel, carbon, titanium, and lots of turn-of-the-century stuff

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
shift problems

Actually, the set up is very conventional. The gears were 52-42-34 with the Ultegra triple derailleur.

Highwheel
Highwheel is offline  
Old 10-01-08, 08:13 PM
  #9  
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Highwheel View Post
Actually, the set up is very conventional. The gears were 52-42-34 with the Ultegra triple derailleur.
But, if I understand your OP correctly the problem is with the FSA crank on the bike. So what are those ring sizes? BTW, a 34 is not standard on a Shimano triple.

And my other question, was the shifter in its lowest position when the cable was attached to the FD?
Al1943 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

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