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Re: LTWOO ER9 & ERX - Electronic groepsets I pulled the trigger and ordered eR9. Along with many of you, I agree that $150 might not be worth the ~55g weight reduction. I can easily save that weight from other reasonable components. Including tax and Aliexpress coupon code, I got the set for ~$530, which makes things very interesting. I plan on staying on 11 speed so that I don't have to upgrade my relatively new cassette(s) that I bought for my bike and trainer.

I have to admit that the price of 105 Di2 is also very tempting. I had seen listing on Aliexpress ~$850 for an almost complete groupset (excluding rotors), which are no longer available. But accounting for shipping and tax, the overall upgrade cost for 105 Di2 is still much higher vs eR9, especially for someone like me who only needs to upgrade the shifter and derailleur combo.

I will try to give an update whenever I get them on my hands and do some testing. I am now eagerly waiting for them to arrive and install them on my bike.
August 08, 2023, 12:18:34 PM 		4
Re: LTWOO ER9 & ERX - Electronic groepsets Quick update for those who are curious about eR9. I ordered no box and no battery. The package itself is well done.

I have bad news and good news. Let me start with the bad news to get it over with. After lots of debugging, I found out that one of the cables (short one for FD) is faulty. Initially, the front derailleur (FD) intermittently stops working and I thought it was the FD that was faulty. It turned out, connecting that cable to the rear derailleur gives the same problem, and so I concluded that it was the cable. I have contacted LTWOO store from which I bought the set and now waiting for a response.

The good news is all other components are really well-built. I was really impressed. The small hood size feels amazing on the hand. Buttons are very clicky and feel solid. The shape and reach of the levers are just perfect for the size of my hand and fingers. The texture of the rubber hood feels slightly different from Shimano, feels a little less smooth, but I like it. Since rear derailleur is fine, it shifts quickly and there is barely any noticeable delay from the moment the button is pressed to the shift. I can confirm that the trim option is there, but no auto-trimming (they removed this for patent reason).

I can also confirm that LTWOO has now enabled 10 speed option on the application. The eR9 set came out to be just slightly lighter than the quoted weight by LTWOO. See the breakdown below.

I have not installed the set on the bike yet. I was bummed that a single cable prevents me testing them on the road. This will have to wait a little while.
August 20, 2023, 11:50:41 AM 		9
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: Plateofboxes on August 21, 2023, 04:44:12 AM
Great to hear. Pity about the cable - should be an easy fix right?

Is the rear mech cage removable on the Er9? Can it be swapped out?

It's good to know that LTWOO has been responsive and will be sending new cable soon. Based on their chat, they may also be sending a new front derailleur for a good measure, so that is good. This should indeed be a quick fix. I only wished the cable is not proprietary and can be found anywhere. Unfortunately, it is not compatible with Di2 either.

The cage is indeed removable, but not quite sure if it is compatible with Shimano-compatible cages. Looking from the design, it looks like it. Don't quote me on that though. Will have to check again.
August 21, 2023, 10:33:47 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets Alright! I think I can now give some thoughts on my eR9 experience. I have now ridden ~400 km over a few rides, one of which was a ~125km ride. I am now using my previous Shimano 11-speed cassette. I guess my take will be similar to what Trace Velo, China Cycling and GC Performance have said; when it works, it is amazing! Shift is smooth, especially when indexed properly. I don't have any issue shifting under load. Though I am only a 70kg rider with max power of ~950W.

So far, I have not had any issue with my unit, except the faulty cable, which LTWOO sent replacement part promptly. My interaction with LTWOO on Aliexpress has been non-optimal, because of the time zone difference and they seem to reply only at certain hours of the days. So, my suggestion if anyone is running into issues is to be precise, concise and easy to understand, as they seem to be using Aliexpress translator for the communication.

A couple of things that I noticed: while the manual trim works, there is no way to switch back to the non-trimmed position, unless you go to the next chainring and back. This should be easily fixed with a firmware update. Another thing I noticed was that battery life is not that great. From a full charge, I could only get ~400km. I am not sure if this is from the battery or just because it is the first battery cycle. I will have check for the next battery cycle.

Installation of the groupset cannot be any easier than installing Shimano Di2 as they are identical, even down to the mineral oil for the brake. The only difference is the way it is bled. LTWOO has another air outlet which should make it easier to bleed. As long as you follow the instructions that LTWOO has on YouTube, you’re good. The brake also feels amazing, I don’t notice any significant difference to modulation or stopping power to a similarly well-setup Shimano brakes.

Overall, I am happy with the groupset and I certainly hope this won’t change anytime soon.
September 21, 2023, 12:50:32 PM 		7
Re: LTWOO ER9 & ERX - Electronic groepsets I can confirm with the latest firmware update, the trim options are now more refined. The front derailleur will decide the best trim position. I also noticed that they have fixed the incorrect gear selection showing up on Wahoo. It was showing 12 speed when in fact I was on 11 speed cassette. I cannot confirm if this is also fixed on any other head unit. It is still showing that the battery is low even when fully charged. Hopefully they will fix this on the next update. Well, it looks like LTWOO is certainly working on making the groupset better and better. Kudos to them!
September 24, 2023, 11:20:56 AM 		3
Re: Seka Exceed RDC Broken Frames: Source of Concern? I had difficult time deciding between SEKA and Elilee, as I thought both are good option. I ended up getting an Elilee. I have not been able to ride the Elilee Blize outside yet, since it's still a little cold up in the northern part of the US (I am a fair weather rider).

One thing that might be overlooked is how easy it is to actually purchase the frame. I kid you not, I sent three emails, Instagram DM, FB message to official SEKA accounts and I hear no response. This was me trying to buy the frame directly. Meanwhile, I got prompt response from Elilee and they have been responsive and answer all my questions even before I decided to get the frame.
February 20, 2024, 06:21:27 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: Serge_K on February 22, 2024, 08:55:54 AM
Because i'm intellectually challenged, i went for a ride and the battery of the er9 died on me. Folks, don't forget to charge your group regularly, please be smarter than me :)
I am not using the original l-twoo batteries because of problems with shipping lithium internationally, so i bought what i found, and the capacity of the cells i found is SHIT. Therefore, i think i can get 500km autonomy or so. This is, afaik, the lithium's fault, not l-twoo's fault. Charge your group very regularly, it's quick to do, but no juicy, no sexy. Was a flat ride, was ok. In the mountains, it would have sucked hard.

Does anyone know if there's a garmin data field with the battery indicator of the er9/erx group?

It happens to the best of us! I now carry the USB charger cable with a USB C to A converter, so I can quickly top up just enough to get me home/anywhere to stop and charge using only my phone. Both the cable and USB converter are so compact I can easily shove them in my saddle bag.
February 22, 2024, 10:05:42 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: kenderu on February 22, 2024, 11:38:50 AM
This is genius.  I went out without charging the groupset after a few months off the bike, and it was fine for the first 40km until the cafe, close to the cafe the FD and RD were getting slow on shifting (FD wouldnt shift the whole way, RD would take 2-3 presses to react), I set the gears to a manageable gear and then everything died on the way back.  Would've saved me if I did this.

I did see that I had 4% battery life left before I left so it was my fault.

Honestly, this is some of the few small things that keeps me from going away from eR9/eRX. For comparison, Shimano's charging cable is bulkier and probably takes much more space in my saddle bag if I want to do the same strategy.

All the flexibility that comes with LTWOO are so user friendly, from the variable 10-12 speed, user replaceable battery, individual gear indexing, air vent for bleeding, great app for on-the-fly adjustments. I know Shimano/SRAM may already have most, if not all of these, but considering I can get eR9 for a fraction of the price (they are now even much cheaper compared to launch price and I got my second eR9 for $380 after tax), I am now a happy user. I am hoping the second and third generation of eR9/eRX would solve all the issues users are currently having. By then, I would not hesitate to recommend the groupset to others.

It's actually somewhat impressive that they managed to do all these in their first generation product, while avoiding all the patent minefield left by Shimano/SRAM.
February 22, 2024, 12:59:32 PM 		3
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: erickr on February 23, 2024, 03:47:54 PM
where are you getting the er9 for $380?

It was a few months ago when AliExpress and 80 Designer Store both had coupon discounts. It was too tempting to miss, so I decided to buy the set for another bike I plan to build for my wife. Nowadays, you can find eR9 for ~ $400 during discount days, which happens quite frequently it seems. Early this month, it was selling for $400.
February 23, 2024, 04:16:31 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets Does anyone know if we can pair eGR with the front derailleur from eR9/eRX? I'd like to have 2x chainring at the front with eGR rear derailleur. The eGR shifter almost looks exactly the same as the new eRX shifter, with larger buttons.
March 15, 2024, 05:41:21 PM 		1