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-   -   Front derailleur replacement compatability (https://www.bikeforums.net/classic-vintage/1238221-front-derailleur-replacement-compatability.html)

App4that 09-06-21 02:31 PM

Front derailleur replacement compatability
 
I have a 95 Trek 820 that has a Shimano Altus C90 fixed down pull derailer. The bracket isn't properly aligned with the chain so proper H/L adjustments aren't possible. Obvious issue is you can't get that derailer anymore. I went looking for a 3x7 MB front derailer as a replacement, and am not sure how to find the offset and seat tube size. I know the seat post is 26.6mm. Though the manual claims the front derailer clamp size is 28.6mm.

I want to install a clamped replacement, but other than knowing to look for a mountain bike and dual or down pull 3x7 am completely lost.

Any help would be greatly appreciated

saias 09-06-21 02:45 PM

95 Trek 820 uses a 28.6 front derailleur clamp. Shimano still makes the Altus line and should be available in 28.6. It's probably for 3x9, but will work for 3x7.

App4that 09-06-21 02:50 PM


Originally Posted by saias (Post 22217852)
95 Trek 820 uses a 28.6 front derailleur clamp. Shimano still makes the Altus line and should be available in 28.6. It's probably for 3x9, but will work for 3x7.

would something like this work? https://bit.ly/3n4x0tb

saias 09-06-21 02:53 PM

Yep. Looks good.


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