New: Take part in the February 2020 BikeRide Giveaway for a Proviz REFLECT360 Cycling Jacket

Welcome guest! Register or sign in to participate in the cycling discussions.


Compatible Front Derailleur
#1
Hi everyone,

Complete newbie here, trying to fix up an oldish cheap bike of mine. I fixed up basically everything but am stuck with needing a new front derailleur and was wondering what I should look for when buying online.

Unfortunately I don't have any way to get to a bike store, so I'm really hoping you guys can help me out.

My bike is a Repco 26" YS628 MTB, the rear derailleur says shimano and the front one says falcon. There are six sprockets on the rear axle and three on the front.

Basically I was wondering if I could buy this part and if it'd work for me. Do I need to worry about things like the angle of my upright I'm clamping it too or the size of the three sprockets? Or is this all standard?

Cheers
  Reply
#2
There are a couple things you need to check on your front derailleur (FD).
- Any "ATB" or "MTB" FD should handle the triple gears fine, just amae sure you don't get a road derailleur intended for 2 front gears.
- You need to know the "clamp diameter" which is the size of the tube the FD clamps on to on your frame. Probably 1", but you should check.
- You need to know if your current FD is "top pull" or "bottom pull". This is basically which way the cable comes out. If the cable goes down from the FD under the bottom bracket, it's a "bottom pull" and vice-versa
- Angle of the seat tube is probably not an issue unless you have a unusual frame design.

It looks like the one you link to should work, but I wanted to give you the details so you know what the issues are.
good luck
  Reply
#3
What you picked will work - but that is an expensive FD.

I like the Shimano M413, which can be had for less than $10- on ebay; can be cabled for top or bottom pull, and is very easy to set up.

The thing you have to watch for is the diameter of the seat tube. There are three standard diameters: 28.6mm (1.125"), 31.8mm (1.25") and 34.9mm (1.375"). There are shims available. Mid level FD for 34.9mm are often very inexpensive, I purchase a short piece of 6061 tubing with 1.125" ID and 1.375" OD, cut pieces to length and slice length wise to make shims. You can see examples:
http://forums.bikeride.com/thread-3167.html
http://forums.bikeride.com/thread-3036-page-1.html
both have 28.6mm OD seat tubes with 34.9mm FDs
Nigel
  Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Used commuter / errand runner in Houston - trailer compatible Patrick Garrett 3 213 12-19-2019, 02:43 PM
Last Post: Painkiller
  Looking to rebuild old project bike :) Not sure how to find compatible parts JoshTrevisiol 5 7,992 10-30-2016, 04:31 AM
Last Post: Painkiller
  Laid back Chromoly seatpost compatible with carbon fiber frame rpesq 3 6,066 03-08-2015, 11:18 PM
Last Post: rpesq
  Front derailleur replacement wd8984 1 5,442 02-14-2013, 05:41 AM
Last Post: nfmisso
  I need a suggestion for buying a new front derailleur. Brongo 3 5,670 01-30-2013, 02:35 PM
Last Post: nfmisso
  What does SIS INDEX compatible crankset mean? ibie1983 3 12,256 01-26-2013, 03:01 AM
Last Post: Painkiller
  Compatible Chain and crankset model for M772 Derailleur bhongt 3 9,524 10-15-2012, 03:07 PM
Last Post: bhongt
  Figuring out the correct front derailleur furicle 7 7,962 09-13-2012, 11:48 PM
Last Post: Bill
  Need new front derailleur Prof Young 5 7,286 09-10-2012, 01:40 AM
Last Post: dochoot
  New Front (and rear?) Derailleur burton 13 12,508 04-01-2012, 11:12 PM
Last Post: burton

Forum Jump: