Go Back  Bike Forums > Bike Forums > Mountain Biking
Reload this Page >

Front derailleur advice

Notices
Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

Front derailleur advice

Old 07-07-20, 12:42 PM
  #1  
HPL
Barred @ Velocipedesalon
Thread Starter
 
HPL's Avatar
 
Join Date: Apr 2019
Location: USA
Posts: 395
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Liked 53 Times in 42 Posts
Front derailleur advice

I need suggestions for a friend regarding a top pull front derailleur for a Mongoose build. He has a Shimano Altus on it, but it quite obviously does not fit well due to the fact that the cable routing has quite an angle when clamped. Is there a front derailleur with the cable clamp situated on the left side that pulls from the top. I'm an old road bike guy so newer MTB stuff is Greek to me. I thought the Ultegra Triple would work, but I believe it is a bottom pull.

Thanks for your help.

Or is this normal?
Attached Images
File Type: jpg
20200707_094504.jpg (87.9 KB, 48 views)
File Type: jpg
20200707_094446.jpg (69.7 KB, 47 views)

Last edited by HPL; 07-07-20 at 06:15 PM.
HPL is offline  
Old 07-08-20, 10:41 AM
  #2  
grubetown
Senior Member
 
grubetown's Avatar
 
Join Date: Sep 2013
Posts: 359
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 104 Post(s)
Liked 17 Times in 15 Posts
This unfortunately is probably a design flaw on the bike.

Is it the stock derailleur?
Can you run the cable around the bottom of the clamp bolt from the other side to reduce the angle?
grubetown is offline  
Old 07-08-20, 01:32 PM
  #3  
HPL
Barred @ Velocipedesalon
Thread Starter
 
HPL's Avatar
 
Join Date: Apr 2019
Location: USA
Posts: 395
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Liked 53 Times in 42 Posts
Originally Posted by grubetown View Post
This unfortunately is probably a design flaw on the bike.

Is it the stock derailleur?
Can you run the cable around the bottom of the clamp bolt from the other side to reduce the angle?
From what l gather, clamping the cable in a CCW direction doesn't make that much difference in the angle were it leaves the cable stop on the frame. It is a donor frame, and you can see where the OE FD was mounted substantially nearer to the BB. Obviously, it was a significantly different design than what he has presently installed. My MTB is from 1985 so I am absolutely no help with this kind of stuff. I'm sure that with all the different suspension frames that have come out in the last dozen or more years, that some components had to be designed more specific to a particular frame for fit and function.
HPL is offline  
Old 07-08-20, 03:32 PM
  #4  
grubetown
Senior Member
 
grubetown's Avatar
 
Join Date: Sep 2013
Posts: 359
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 104 Post(s)
Liked 17 Times in 15 Posts
A top swing will be a better replacement
grubetown is offline  
Likes For grubetown:
Old 07-08-20, 11:37 PM
  #5  
70sSanO
Senior Member
 
70sSanO's Avatar
 
Join Date: Feb 2015
Location: Mission Viejo
Posts: 2,206

Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 480 Post(s)
Liked 214 Times in 160 Posts
Take a look at a Deore M510. It is a low clamp/top swing and the cable routing should work for you. It is a dual pull and the top pull routes from the back.
The bike is hanging from the rafters. I can't see the P/N on the cage, but I'm pretty sure it is an M510.

John
70sSanO is offline  
Likes For 70sSanO:
Old 07-10-20, 08:13 PM
  #6  
HPL
Barred @ Velocipedesalon
Thread Starter
 
HPL's Avatar
 
Join Date: Apr 2019
Location: USA
Posts: 395
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Liked 53 Times in 42 Posts
Originally Posted by 70sSanO View Post
Take a look at a Deore M510. It is a low clamp/top swing and the cable routing should work for you. It is a dual pull and the top pull routes from the back.
The bike is hanging from the rafters. I can't see the P/N on the cage, but I'm pretty sure it is an M510.

John
Thank you for the response John. That style would definitely solve the problem! He must have thought it could be built with whatever was in the spare parts bin. There's a good chance that that is exactly what was installed in the first place.
HPL is offline  
Old 07-13-20, 10:14 AM
  #7  
prj71
Senior Member
 
Join Date: Jun 2015
Posts: 1,909
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 1071 Post(s)
Likes: 0
Liked 59 Times in 48 Posts
What's a front derailleur?
prj71 is offline  
Likes For prj71:

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.