Author Topic: LTWOO ER9- front derailleur--- not communicating with RD  (Read 3987 times)

vito117

LTWOO ER9- front derailleur--- not communicating with RD
« on: May 21, 2026, 05:49:45 AM »
Have the version V1.0 here.
So I removed the RD and FD to do some maintenance on the frame.
Kit sat on the bench maybe a day or 2.
Put it all back and now FD wont engage.
RD works fine. Shifters fine. Battery fine. Cables fine. Removed app. New account, reinstalled app, re-paired. Still nada.
Even took the FD and plugged it into another ER9 bike and it did work. So rules FD out.

So what the phuk would make a somewhat perfectly working fine set all of sudden stop communicating with one another?
Something in the RD since this is the brains of the operation.
Of course LTWOO service is worthless as tits on a boar to reply.

Alberto

Re: LTWOO ER9- front derailleur--- not communicating with RD
« Reply #1 on: July 21, 2026, 06:54:47 AM »
Have the version V1.0 here.
So I removed the RD and FD to do some maintenance on the frame.
Kit sat on the bench maybe a day or 2.
Put it all back and now FD wont engage.
RD works fine. Shifters fine. Battery fine. Cables fine. Removed app. New account, reinstalled app, re-paired. Still nada.
Even took the FD and plugged it into another ER9 bike and it did work. So rules FD out.

So what the phuk would make a somewhat perfectly working fine set all of sudden stop communicating with one another?
Something in the RD since this is the brains of the operation.
Of course LTWOO service is worthless as tits on a boar to reply.

Any new on this issue?
I have a different, but similar, issue.
On my LTWOO eR9, my L shifter stopped working.  It works only sporadically, and generally with some seconds delay.
The Front mech works perfect from the app, so the mech itself is good. Battery changed in the shifter, no change.
I haven't found a solution yet.

In addition, I am annoyed that ltwoo seems NOT to sell spare replacement parts, so I can't just buy only the R shifter and changed it.
Cheers,