LTWOO ER9 & ERX - Electronic groepsets

[Chiyou]

Hi, is anyone else having issues with trimming?

Yes, I seem to be in a similar situation as you are with slight rubbing in the middle sprockets when on the big front ring. When using the trim function (i.e. pressing the front shift button a second time), the front derailleur doesn't center on the chain and instead is positioned too far to one side.

And agreed, it should be possible for L-Twoo to improve this through software. There was a recent FD firmware update (v1.12 I believe) but that didn't fix anything for me. The app has a 'Single gear fine tuning' section for both the FD and the RD; while the RD tuning works great, I haven't been able to figure out how the equivalent FD option is meant to work. There is this weird cross-hair symbol in the bottom right corner of the app screen - no idea what that does.

[Sebastian]

Did anyone manage to fit an 11-34 and test it out?

Also looking to know pulley wheel dimensions and how many teeth... would change those to a purple if mine would fit

Same here. Recently upgraded to an 11-34 12speed cassette. I had to adjust the RD b-screw so the upper pulley sits far away enough from the cassette to not have excessive vibrations. Because otherwise the RD would not stay in gear and shift back down the cassette. I've been in touch with LTWOO and found out that this is a sort of protective feature of the groupset. Adjusting the b screw accordingly solved my issue.

Also, I complained here earlier that I found the RD slow to shift. Upgrading from 11sp to 12sp I've found that it shifts quicker now. That makes sense, because the RD moves just as quickly as before but has to travel less distance from gear to gear on a 12sp cassette compared to an 11sp one. I think despite being compatible with 11sp and 10sp, this groupset seems to work best with 12sp components.

[Sebastian]

I wish there was a general gear shift trim feature in the app on top of the individual gear tuning, sort of like the barrel adjuster on a mechanical RD. I got it perfectly set up on the road but when I put the bike on my direct drive turbo, the indexing on that cassette is just slightly off enough in a few gears to be really annoying. But adjusting the individual gears every time I put the bike on and off the trainer is super tedious.

[Pedaldancer]

I wish there was a general gear shift trim feature in the app on top of the individual gear tuning, sort of like the barrel adjuster on a mechanical RD. I got it perfectly set up on the road but when I put the bike on my direct drive turbo, the indexing on that cassette is just slightly off enough in a few gears to be really annoying. But adjusting the individual gears every time I put the bike on and off the trainer is super tedious.

What about writing that to ltwoo? I agree that's super bad. This is not only valid for the power trainer, it's also interesting when you use two wheelsets. With my mechanical Ultegra I only have to adjust with some clicks and I am done. Basically, that's an important point for me. I switch my wheels very often on my commuter. For the disc rotors I worked with shims, but for the rear derailleur I use the tension adjustment screw every time.

I was thinking about using er9 for my commuter, but somehow that's a no go then. 

[benquick]

what cassette are you using? 105?

Thanks

Yes, 105 and it works fine.

[zerstorer]

I wish there was a general gear shift trim feature in the app on top of the individual gear tuning, sort of like the barrel adjuster on a mechanical RD. I got it perfectly set up on the road but when I put the bike on my direct drive turbo, the indexing on that cassette is just slightly off enough in a few gears to be really annoying. But adjusting the individual gears every time I put the bike on and off the trainer is super tedious.

A better alternative would be to have individual profiles within the app that you can save to. So you can just load the profile when needed.

[Sebastian]

I was thinking about using er9 for my commuter, but somehow that's a no go then. 

I mean you could even save various presets in the app. One for every wheelset or the trainer and just switch between indexing settings via app. Shouldn’t be too hard to implement. I’d love that. I’ll send them an email.

[Pedaldancer]

I mean you could even save various presets in the app. One for every wheelset or the trainer and just switch between indexing settings via app. Shouldn’t be too hard to implement. I’d love that. I’ll send them an email.

Since yesterday when I wrote that i had the same idea. So there could be a set of different rear wheels. That would be the perfect solution. I am very curious what they reply to you.

Besides that, I hope they improve the sealing quickly on the rear derailleur plug.

[hubertus]

My rear derailleur stopped working as of a couple of days ago. I was starting a casual ride, and out of nowhere it stopped shifting. The motor makes a sound but no shifting happens. FD works totally fine.

The template below was shared when talking to customer service.

[jonathanf2]

I was really interested in the ER9/X, but with all these failures, I honestly can't see myself ever buying anything from LTwoo.

[mirphak]

The mechanical ones work fine, at least the RX12. But yeah, really disappointing how much the electronic ones fail

[mrpercussive]

Anyone else experienced this issue? Seems to happen at temperatures around 40 degrees F mid ride after sitting outside while i'm at a cafe for like an hour. The big paddle kinda stops the small paddle from releasing itself and thus the continuous shifts. Seems to fix itself though after i get home and put the bike in the house. Has so far happened twice.  Emailed L-Twoo last week and have yet to hear back

https://youtube.com/shorts/1CciDVTh-U0?feature=share

[Pedaldancer]

The mechanical ones work fine, at least the RX12. But yeah, really disappointing how much the electronic ones fail

The thumb shifter is something ... well, you like it or hate it, I guess.  .
With all the rear derailleur failures,  my brain clearly says "no way". It's pretty bad, they must have underestimated the power of splashing water.

[Dark17]

Maybe my unit is lucky because I get caught in the rain a couple of times and it's still flawlessly working. Tho I'll be changing the groupset to 105 Di2 because I wanted a more reliable brand and I'll be using the LTwoo as a placeholder for my next project which is a Gravel bike until I score myself some SRAM Force or Rival

[mirphak]

The thumb shifter is something ... well, you like it or hate it, I guess.  .
With all the rear derailleur failures,  my brain clearly says "no way". It's pretty bad, they must have underestimated the power of splashing water.

I don't really mind it, but have a slight preference toward the shimano styled shifters. Sensah style is not perfect either with that super long not-so-precise push for going up 1 or 2 times .