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

Upgraded FD hits chainrings

Notices
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.

Upgraded FD hits chainrings

Old 10-21-21, 02:12 PM
  #1  
epnnf
Full Member
Thread Starter
 
epnnf's Avatar
 
Join Date: Jun 2008
Location: SW Ohio
Posts: 401

Bikes: 2016 Masi strada vita due, 2019 Kona Dew Plus

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 268 Post(s)
Liked 80 Times in 55 Posts
Upgraded FD hits chainrings

Im upgrading the Kona w/alivio FD, micro shift SL & jagwire cable/housing. I haven't even put the chain back on, but the cage of the FD is too far away from the frame- small chainring, mid & big. When the FD is shifted to big ring, the cage hits the ring. FWIW, the FD is bottom swing & the band sits between the seat tube brazeon holes. The acera FD wasnt like that.
epnnf is offline  
Old 10-21-21, 02:30 PM
  #2  
HillRider
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times in 741 Posts
When the FD is shifted to the big ring, does the inner cage it hit the middle ring? What are your chainring sizes? How high is the outer cage of the fd above the big ring?
HillRider is offline  
Old 10-21-21, 02:45 PM
  #3  
epnnf
Full Member
Thread Starter
 
epnnf's Avatar
 
Join Date: Jun 2008
Location: SW Ohio
Posts: 401

Bikes: 2016 Masi strada vita due, 2019 Kona Dew Plus

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 268 Post(s)
Liked 80 Times in 55 Posts
when the FD is shifted to the big ring, the inside of the cage hits the inside of the big ring. Chainring sizes are 28/38/48. The outer cage is ~ 1/8" above the big ring.
epnnf is offline  
Old 10-21-21, 02:47 PM
  #4  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18349 Post(s)
Liked 4,501 Times in 3,346 Posts
How about some photos?

Most attachment styles allow moving the derailleur up or down if the outer cage hits the big ring, or the inner cage hits the small/middle rings.

You have two adjustment screws on the derailleur to adjust the maximum range the derailleur moves out, or the maximum range it moves in.

Also adjusting either the cable attachment, or an inline cable adjustment (at shifter?), you can do fine adjustment of the cable length which can impact how it shifts (too tight, or too loose).
CliffordK is offline  
Old 10-21-21, 03:12 PM
  #5  
cxwrench
Senior Member
 
cxwrench's Avatar
 
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767

Bikes: lots

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1958 Post(s)
Liked 2,932 Times in 1,489 Posts
Adjust it.
cxwrench is offline  
Old 10-21-21, 03:24 PM
  #6  
epnnf
Full Member
Thread Starter
 
epnnf's Avatar
 
Join Date: Jun 2008
Location: SW Ohio
Posts: 401

Bikes: 2016 Masi strada vita due, 2019 Kona Dew Plus

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 268 Post(s)
Liked 80 Times in 55 Posts


w/FD in big ring

w/FD in small ring
epnnf is offline  
Old 10-21-21, 03:40 PM
  #7  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18349 Post(s)
Liked 4,501 Times in 3,346 Posts
Originally Posted by epnnf
Ok,
The vertical height looks reasonably good. The derailleur tail is coming pretty close to the ring, indicating that the derailleur was probably made for smaller chainrings, but it should be OK.

On top of the derailleur you have the upper and lower limit adjustment screws.

You can usually look at the design, or feel for tension in the screwdriver. But, I think the outer one is usually the upper limit. Screw that in until the derailleur pulls away from the chainring.

Then screw out the inner one until it drops closer to the right spot for the inner ring (and make sure the cable isn't too tight).

(or visa-versa).
CliffordK 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 © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.