Bicycle TutorBicycle Tutor

Show off your bike!

Related video tutorials:
How to Adjust Your Front Derailleur How to Adjust Your Front Derailleur
* Now with 3D interactive instructions
I need a suggestion for buying a new front derailleur.
#1
I own a '13 Trek 7.2 FX with this front derailleur and it never worked that well, so I want to upgrade it.

My choices for 8 speeds are pretty small, so is it possible to put a 9 speed front derailleur on a 8 speed chain and bike? Also, how do I know which version to put on a bike? I was thinking about getting a Shimano Deore if it's compatible, and there's this version and this version, and I don't really know the difference, so yeah.

If I have to choose an 8 speed, what would you suggest?

EDIT: I forgot to mention that my crank is 48/38/28, if that matters. And also, I may decide to upgrade everything in the near future to 9 speed all deore, so that's why I want a nine speed.
Reply
#2
All of the Shimano FD work well, yours needs a tune up or possibly it is damaged.

Personally I like the M413 which can be found on e-bay for a reasonable price.

One thing you have to watch out for is the seat post diameter; standard sizes are 28.6mm, 31.8mm and 34.9mm.

Another thing you have to watch out for is top or bottom pull; some FDs are only one or the other, and a few are both. The M413 are both.
Nigel
Reply
#3
Alright. Is the M412 that much difference from the M413? Also, would it be possible to put a 9 speed derailleur on a 8 speed chain? Also, from what I've noticed and heard, that derailleur specifically had problems and with changing to a higher gear and the best thing to do is get a new one.

(01-30-2013, 04:26 AM)nfmisso Wrote:  All of the Shimano FD work well, yours needs a tune up or possibly it is damaged.

Personally I like the M413 which can be found on e-bay for a reasonable price.

One thing you have to watch out for is the seat post diameter; standard sizes are 28.6mm, 31.8mm and 34.9mm.

Another thing you have to watch out for is top or bottom pull; some FDs are only one or the other, and a few are both. The M413 are both.
Reply
#4
The M412 is very different from the M413. I have one M412 and several M413. I get FDs intended for 34.9mm seat posts and use a shim (home made) to work with the 28.6mm seat post - see: http://forums.bicycletutor.com/thread-3167.html, especially the later pictures of the finished bike (which are above the airplane picture).
Nigel
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Problem with my Front Derailleur on my Bike CUDAcores89 1 766 10-17-2017, 08:12 PM
Last Post: kazz
  Front Derailleur/Shifter Problem kazz 0 794 10-06-2017, 02:28 AM
Last Post: kazz
  Front derailleur shifting problem dventura 1 6,708 02-28-2017, 06:07 PM
Last Post: nfmisso
  Front derailleur won't shift into third (largest) gear bruin1989 1 7,859 08-01-2016, 07:14 AM
Last Post: Joe_W
  Front derailleur can't shift from inner chainring to outer...sometimes Ptero 2 4,909 07-19-2016, 02:15 PM
Last Post: Joe_W
  Front derailleur drags on middle chainring? fionn88 1 4,863 06-09-2016, 08:56 PM
Last Post: DaveM
  Remove chain from front derailleur rider2 1 4,190 05-13-2016, 04:16 PM
Last Post: DaveM
  Chain Coming off Randomly / Front Derailleur Jlpicard440 12 7,066 09-07-2015, 06:29 PM
Last Post: painkiller
  Blocked front derailleur? dude 2 3,632 08-27-2015, 06:38 AM
Last Post: dude
  A Front Derailleur mounting and matching problem. qipow 0 3,703 08-08-2015, 11:53 AM
Last Post: qipow

Forum Jump:



ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy / Created by Alex Ramon

feed