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Re: Yuanan Carbon fiber wheelsets double 11 discount promotion
Quote from: Leon Hu on October 29, 2023, 09:33:43 AM
Hi everyone, have a nice day! So sorry for i leave the wrong number, my Whatsapp is +86 15738274372

I went ahead and edited the original post to have the updated/correct number to avoid anyone else calling the incorrect one.
October 29, 2023, 07:58:02 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets Hiall. With regard to the RD connector, I have sealed this with heat shrink tubing.  Let’s see how this works. This is my 3rd RD. Works as a charm again. Hopefully three is the lucky number.
January 10, 2024, 02:42:18 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: SirBikealot on March 19, 2024, 03:26:56 PM
finally pulled the trigger yesterday. 330€ without maybe customs was too temting. Has anyone replaced the breakpads by now and can say, if there is a shimano alternertive? and if yes which model does fit?

I paired my eR9 with ZRace XG caliper and Cooma Elite pads (the pink ones). I am just impressed with the Cooma pads. For the price, it has no business being so good and I have used all different kinds of Shimano pads before. I can comfortably say they are almost as good as Shimano's. Please note that I weight somewhere between 68-70kg, depending on the days, so that may change the results. Also impressed with the very minimal disc squealing noise.
March 19, 2024, 09:32:08 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: SirBikealot on April 05, 2024, 08:27:17 AM
the mailman rang a few minutes ago. Had to weigh everthing before i rememered to tell about the tax and so.
Price as declared was 83€ and i payed 19% VAT (15,77€) and a 6€ handling fee from DHL. So in total 21,72€ on top of the original price.

Thanks!
Yes in Portugal would be much different as they'd want the real invoice.. In Belgium I dunno... still waiting. Anyway I got a full groupset 105 hydraulic for 190euro delivered which I think wasn't bad. Going mechanical for now eheh
April 05, 2024, 09:56:08 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets  
Quote from: SirBikealot on May 16, 2024, 05:42:16 AM
Thats me and nope no solution yet. Just for saftey reasons that i by mistake shift both exactly at the same time i put my charging cable and a usb-a to ubs-c adapter in my saddlebag, so i can connect the rd to my phone as a charging device and get it working again.
Maybe some pseudo "calibration" needs to be done, because mine thought it was in the smales cog altough it was in the middle of the cassette

you run 2x11 or 12? Yestrerday I was testing and with gear protection off my system go down after only one change from 1 to 2 at front, with gear protection on this situation happend less often. I think this is connected with some adjusment of FD, when shift on front is smooth then is ok, when not system is blocking.

I'm in contact with Ltwoo and Store from aliexpress ,but damn, they are silent ;/ Support even not exist

Could somone whith 53-36 on front take photo of FD when is at second gear ( now mine is set with sticker 3mm up the tooth) and screen with calibration for FD on 1 and 2 gear (i know that this depends which frame, hanger etc.)

//Edit: I have contact with a few people with Ltwoo and I have tommorow video call or chat with someone from tech support, will see
May 16, 2024, 05:59:46 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: SirBikealot on May 16, 2024, 07:58:03 AM
it's 2x11 with 50-34 and 11-32
really looking forward to the outcome of your video call
I have Fix my problem :) take voltage meter and check V of batteries 14500 should have from 2.2v?? To max 4.4 (something like that), mine have 5.2-5.5V, now long 5h ride with new batteries ( this new have 4.2v) and 0 problem, 0! :)
May 19, 2024, 08:09:30 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets eR9 issue and fix

I had an issue with my L-TWOO eR9 groupset today that I later fixed. It was most likely user error, and I'm posting it here in case it could help someone else in the same situation.

tl;dr
Problem: The front derailleur wouldn't shift, but the rear derailleur shifted just fine.
Fix: Ensure both derailleurs are firmly plugged into the battery, by unplugging them at the battery end, and firmly plugging them back in.
Likely reason: Poor connection to the seatpost battery on the battery end, possibly caused by vibrations by being transported in a car.
Other plausible reason: Dodgy batteries.

Situation

I was going for a ride in the morning, and I loaded my bike (https://chinertown.com/index.php/topic,4952.0.html) in the boot (trunk for those of you in the US) of my sedan (saloon for those of you in the UK), lying on the side (NDS). The drive to the start of the ride took about 20 minutes. When I took my bike out of the car, the rear derailleur shifted just fine, but the front derailleur wouldn't budge.

I tried the following:
  • Shift using the shifters
  • Shift using the app
  • Unplug the rear derailleur, wait 10 seconds, then plug it back in
  • Unplug the front derailleur, wait 10 seconds, then plug it back in
  • Calibrate the front derailleur using the app
  • Adjust front gears using the app
  • Change front derailleur high and low limits in the app
  • Swap the gear shift responsibilities of the left and right shifters
  • Try with one-touch shifting both on and off
  • Try with gear protection both on and off
  • Rear derailleur firmware update - was using version 0.1.1, no updates available
  • Front derailleur firmware update - app reported current version 0.0 and latest 0.0
  • Reset to factory settings - this reset all my derailleur position settings (which I fortunately had saved)

The only response I got from the front derailleur was when I plugged the front derailleur cable back in. It was a buzz reminiscent of Trace Velo's issue (https://youtu.be/32UDzOrqK2I?t=78s).

Other behaviour I noticed:
  • The app reported 91% battery level.
  • The app reported that I used the latest rear derailleur firmware version 0.1.1
  • The app reported that I used the latest front derailleur firmware version 0.0. This was different to what it previously reported, which was 1.12
  • The app would show that the front gears had changed when I used the app, but nothing happened.
  • When I tried to adjust the front derailleur position for the large chainring in the app, the app showed a position of 0. This doesn't match what I saw from Trace Velo's video. The position for the small chainring showed correctly what I had set it to previously (12).

Other points of note:
  • The app reports that I'm using model ES-R9001.
  • The serial number on the rear derailleur starts with 250123.
  • The battery holder uses coil springs rather than leaf springs to hold the batteries in place.
  • I'm running the groupset as 2x11.
  • I haven't ridden the bike in the rain or on wet roads, and I haven't washed the bike.

At this point I thought the rear derailleur was toast (which apparently was Trace Velo's problem in the end), but I decided to do a short solo ride anyway, with the front stuck in the small chainring. After riding for about 50 meters, I tried to change to the large chainring, and it shifted! Actually, it over-shifted, because I had lost my position settings when I "Reset to factory settings". So I stopped, put the chain back on, and tried to shift down. No response. The rear still shifted just fine. I then proceeded to try many of the steps listed above one more time, but no luck.

So I started riding again, and after another 50 meters of so, I could shift back to the small chainring. That was the last time the front derailleur shifted until I got back home, so put my rear derailleur position adjustments back as they were and did the ride in the small chainring. It was fairly hilly, so I could at least get up the hills!

After I got back home, the front still wouldn't shift. At that point, I wanted to check the connections on the battery end. So I pulled out the seatpost carefully, as I wanted to see what state the connections were. But as I pulled the seatpost slowly and carefully up and out, both derailleur cables came loose from the battery case connectors. I then plugged both of the cables into the battery holder, and immediate success! I could shift up or down without issue as before, and the front derailleur firmware now showed the correct version.

My main hypothesis is that I didn't plug the cables properly into the battery, and that the vibrations from being transported in a care shook them loose. Then when I started riding, the movement caused just enough of a connection to be established so I could shift.

Assuming that's the cause, does anyone have suggestions for how to better secure the cables at the battery end?

Another hypothesis is that the issue was caused by dodgy batteries in the battery holder. I don't have anything to support this hypothesis currently, apart from the fact that I'm using unbranded batteries from eBay (https://www.ebay.com.au/itm/256250808223). They've been charging fine, and the reported charge hasn't dropped much with each ride. Regardless, I now have a branded set on order.

I'll also keep this bike for shorter trips for the time being, and be ready to pull out the seatpost should the problem reappear.
May 26, 2024, 08:19:35 AM 		1