I have a 3x8 road bike, but mistakenly bought a 3x10 Shimano derailleur/brake lever. Will it work or should I exchange?


No, the cable pull is different between 8 speed and 10 speed. You will need to exchange it.

There is a detailed explanation here, but the short version is that there are no 8 speed rear derailleurs that are compatible with 10 speed shifters, or vice versa.

  • Well...thank you...and Rats!! I'll exchange, and you saved me probably hours of frustration!
    – JoninIlm
    Jul 12 '16 at 0:00

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