Author Topic: Question about L-Twoo ERX rear derailleur  (Read 1226 times)

gumby

Question about L-Twoo ERX rear derailleur
« on: May 05, 2024, 02:34:13 AM »
I've had an L-Twoo ERX groupset for about 9 months now. I've never been super impressed with the shifting precision but for the price I wasn't going to complain too much. Today I put a new cassette and chain on and when doing so I noticed that the derailleur cage looked bent.  The bottom pulley sits further outbound than the top.  Immediately I figured the derailleur hanger must have be bent somehow, not sure how as this bike has never been off the trainer, but nonetheless, that was my first thought.  Before pulling the bike out of the trainer and into the bike stand I figured I'd throw on the 105 derailleur I had on the bike before putting on the L-Twoo groupset, it lined up perfectly. I then put the hanger alignment tool on, it is also perfect.  The only remaining thing is that the L-Twoo derailleur is bent somehow, or maybe it is just like that by default (which would be a bit weird). Can any of you out there with L-Twoo ERX drivetrains have a look and see if yours looks like mine?  It's hard to photograph but you should be able to see what I mean in the attached image.



jonathanf2

Re: Question about L-Twoo ERX rear derailleur
« Reply #1 on: May 05, 2024, 11:25:23 AM »
My ER9 derailleur cage has just a minor outward bend and shifts fine on a 12 speed cassette. Though the ER9 has a full alloy cage setup, while I believe your ERX cage is an alloy+carbon setup. The carbon could be flexing more outward?

TidyDinosaur

Re: Question about L-Twoo ERX rear derailleur
« Reply #2 on: May 05, 2024, 12:05:26 PM »
That gap on the bottom between the 2 plates also looks weird. Is that normal?

Chiyou

Re: Question about L-Twoo ERX rear derailleur
« Reply #3 on: May 06, 2024, 12:42:40 PM »
My eR9 looks similar (sorry for the muck and grime).

gumby

Re: Question about L-Twoo ERX rear derailleur
« Reply #4 on: May 06, 2024, 05:27:27 PM »
Thanks for the replies everyone.  Based on other images things see to be somewhat normal.  There is also a bit of play in the derailleur but that isn't super abnormal given derailleur linkage.  The shifting works well, however I can still hear a slight clicking in most gears like the chain isn't quite aligned and is slightly rubbing against the pickup teeth on the cog which annoys the heck out of me.  Since this bike is on the trainer 24/7 (I haven't even installed the calipers) it is maybe more noticeable than if it was outside and there was more ambient noise around.  That said, when my cable activated 105 is dialed in perfectly I hear zero clicking noise.

zerstorer

Re: Question about L-Twoo ERX rear derailleur
« Reply #5 on: May 06, 2024, 06:35:11 PM »
Did you try to microadjust each cog individually?