Bicycles Asked by itisravi on July 12, 2021
My bike has a 2×8 speed Shimano Claris 2400 front derailleur and ST-2400 shifters. The FD is damaged. Can I replace it with the newer Claris R2000 FD? Shimano’s compatibility guide indicates that it can be mated only to the ST-R2000 shifters. Is that really the case in practice? If it isn’t, might I as well replace it with a Sora or Tiagra double FD (of the same stye/cable-pull)?
I understand how mix and match could be a problem with the rear derailleur because of different indexing but aren’t all double FDs equal?
The road compatibility chart does indeed say that the R2000 front derailleur not compatible with 2400 shifters.
Rear derailleur actuation ratios are fairly well documented, but I've never found a good source for front derailleurs, I do know that you cannot assume that all double front derailleurs are compatible.
Your best best is just to replace with a 2400 series derailleur. Good news is that FD-2400 units are still available and and inexpensive.
Answered by Argenti Apparatus on July 12, 2021
It is possible to use the newer claris design with the old shifters but it might not be satisfactory. To achieve the correct movement, the gear cable will be a little too loose in the lower gear or a little too tight in the higher gear (assuming the limit screws are set properly).
If it's all you have, yes you can achieve a functional setup but it's not the best option.
Answered by JoeK on July 12, 2021
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