For my new Shimano M780 based gear I need a pull down (or bottom pull) front derailleur with a 28.6mm clamp for a 3x10 without direct mount. All the derailleur I have checked do not have a 28.6mm clamp. Are there not produced anymore? And if so, what would be the solution?

  • get a 30.1mm and get a shim like this one ebay.com/itm/…
    – dmb
    Commented May 15, 2018 at 13:38

1 Answer 1


You can buy a braze on derailleur of the type you need and get a Braze on to 28.6 adapter. Alternately, you can get a derailleur with a larger size and get a shim. Either will be perfectly functional. Very few Mountain Bikes have 28.6 downtubes anymore so the likelihood of finding a 28.6 seems pretty low.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.