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Tiagra77 04-30-21 12:43 PM

Front derailleur compatibility
 
Hello. I bought an old vintage bike for cheap but there is a problem with it. The front derailleur is broken and I have to change it. However, I don't have any idea on the compatibility of this part. There is 2 chainrings and 6 speeds in the back for a total of 12 speeds. Thank you in advance.

Bill Kapaun 04-30-21 01:03 PM

If you have friction shifting, most any cheap FDER will work. Just get one appropriate for the size chain rings you have.
I turned the FDER on an old 2X5 Takara into a pretzel when I broke a chain. A Shimano Tourney filled the bill just fine.

Tiagra77 04-30-21 01:40 PM

Ok thanks. But then why some derailleurs have a number of speeds written on it, or in the description ?

2_i 04-30-21 02:29 PM


Originally Posted by Tiagra77 (Post 22038679)
Ok thanks. But then why some derailleurs have a number of speeds written on it, or in the description ?

Chain width changes with the number of speeds in the rear. The cage of the front derailleur may be adjusted to accommodate the different width and it should be particularly important for triple derailleurs. For less expensive double derailleurs you should be fine no matter what, fine tuning the operation with limit screws.

Bill Kapaun 04-30-21 02:34 PM


Originally Posted by Tiagra77 (Post 22038679)
Ok thanks. But then why some derailleurs have a number of speeds written on it, or in the description ?

The "more speeds", the narrower the cage is which doesn't work that well with your wider 6 speed chain.
The Tourney is a bit clunky, but works well for the application I stated.


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