LTWOO ER9 & ERX - Electronic groepsets

[TidyDinosaur]

It won't work with a normal usb charger. The batteries are 7.2V. That's why the usb plug of the charging cable is so big. It will probably increase the 5v output of a normal charger
But if this connector fits, you could theoretically solder it to a charger with the correct output.

[jonathanf2]

Yesterday I took the ER9 bike out with extra padded shifters and using gel padded gloves. Adding bar tape strips on the inner top part of the shifters helped on comfort and probably using the gel padded gloves as well. Though it's still not as comfortable as bigger Shimano hoods, but at least I didn't get any hand numbing. Also I needed to do some more gear fine tuning specifically in the small/big and big/small combination. I was having slight shift issues shifting up and down the three biggest cogs while on the small chainring. Its most noticeable on climbs constantly shifting while adjusting for elevation and cadence. I'm hoping I have it dialed in now, if not I'll have to do the gear fine tune while riding.

Other than that, the ER9 has been running great. If I was building a new bike now, I wouldn't hesitate using Chinese electronic groupsets. My old semi-internal TFSA frame definitely feels like a new bike with all the component upgrades!

[atlet]

Any link to order 14500 batteries for ER9 from EU?

[TidyDinosaur]

Any link to order 14500 batteries for ER9 from EU?

nkon.nl

[atlet]

nkon.nl

Ordered already 2 different types of batteries and nobody fit.

This are to big: https://eu.nkon.nl/rechargeable/li-ion/14500-16340/keeppower-14500-800mah.html
This don't touch the contact (they don't have button top): https://eu.nkon.nl/rechargeable/li-ion/14500-16340/sanyo-ur14500ac.html

Now I ordered this (hope will be ok): https://eu.nkon.nl/rechargeable/li-ion/14500-16340/xtar-14500-800mah-protected-1a.html

What are the right one?

[SirBikealot]

Ordered already 2 different types of batteries and nobody fit.

This are to big: https://eu.nkon.nl/rechargeable/li-ion/14500-16340/keeppower-14500-800mah.html
This don't touch the contact (they don't have button top): https://eu.nkon.nl/rechargeable/li-ion/14500-16340/sanyo-ur14500ac.html

Now I ordered this (hope will be ok): https://eu.nkon.nl/rechargeable/li-ion/14500-16340/xtar-14500-800mah-protected-1a.html

What are the right one?

the last one should fit well. The first one are protected ones that are way too high.

i got myself a set of this one, which fit perfect and can be recharged in case i left my ltwoo charger at home.
https://www.akkuteile.de/en/lithium-ionen-battery/size-14500/keeppower/keeppower-14500-1100mah-li-ion-3-7v-3-6v-with-usb-charging-facility-and-pcb-p1411u_12087_2926

[Koekembak]

So rear derailer stopped working, it’s my girlfriends and I’m not sure if she did something or not but it doesn’t work anymore.

It makes a sound when I shift but won’t shift, right before it was shifting from1-5th gear, (1st being biggest sprocket) and then I was messing with it it got stuck in 1 and won’t shift anymore, just a bit of clicking sound.

Does anybody had this happen before.

https://m.youtube.com/shorts/Ufatm9ERIA0

Sounds like I am getting my money back, but I want a rear derailleur

[Serge_K]

In the last few days, the er9 RD of a friend died for no reason. Got stuck in the hardest cog and nothing will make it shift, including reset, unplugging, replugging and everything i could think of. The FD works fine.
Then today, went for a ride with my gravel bike, and my own RD died exactly the same way! I went down a descent with bad asphalt and vibrations, at the end of the descent, dead RD.
I'm trying to get a response from l-twoo via the intermediary that sold me the groups, I'll keep you posted.
But as of right now, I'm extremely unhappy and would not recommend er9/erx because a bike has to work, if you can't trust your derailleur to shift, then buy something else.
I'll post updates.
TWO DEAD er9 RDs in one week under normal use.

[Serge_K]

https://m.youtube.com/shorts/Ufatm9ERIA0

Try resetting it. Long press the button on the RD, like 10 seconds.

[jonathanf2]

In the last few days, the er9 RD of a friend died for no reason. Got stuck in the hardest cog and nothing will make it shift, including reset, unplugging, replugging and everything i could think of. The FD works fine.
Then today, went for a ride with my gravel bike, and my own RD died exactly the same way! I went down a descent with bad asphalt and vibrations, at the end of the descent, dead RD.
I'm trying to get a response from l-twoo via the intermediary that sold me the groups, I'll keep you posted.
But as of right now, I'm extremely unhappy and would not recommend er9/erx because a bike has to work, if you can't trust your derailleur to shift, then buy something else.
I'll post updates.
TWO DEAD er9 RDs in one week under normal use.

Keep us posted if you're able to get a replacement RD. I wonder what other issues might be affecting the ER9/X besides water ingress. Does extreme vibration mess with the RD motion sensor, causing it not to wake from sleep mode?

[Koekembak]

PEOPLE I HAVE FOUND THE FIX AND MIGHT HELP YOU.

Look at the photo hopefully this will explain and otherwise get in contact with me.

Hopefully this works for you!

(I posted that I had a problem yesterday)

[TidyDinosaur]

Looks like buying this groupset is clearly a gamble. Seems to me it just isn't tested good enough and buyers are (once again) beta testers...

Let's hope the next version is better...

[kbernstein]

Warranty issues aside how are the details on the groupset? did they copy old shimano mistakes like plastic threads on bleed port, flathead brake pad pin, random useless sharp bit in the caliper etc
and is it possible to buy electronic ltwoo with the zrace/iiipro calipers like it is for the mechanical version?

[Serge_K]

PEOPLE I HAVE FOUND THE FIX AND MIGHT HELP YOU.

Look at the photo hopefully this will explain and otherwise get in contact with me.

Hopefully this works for you!

(I posted that I had a problem yesterday)

I can't read your scribbles, but I'm very interested. Would you mind using Paint and the text function, or PowerPoint with text boxes over the photo instead?
Thanks!

[Koekembak]

Lol I’m sorry I do scribble but In essence the final drive gear that drives the arm that shifts had a tooth broken off, I’m not sure if this was my girlfriend frantically shifting without pedaling or something like that. She honestly doesn’t know yet how to shift because she is new to cycling.

For this problem you need to have a derailleur that is stuck in a biggest or smallest gear and still makes noise when you shift, or a rear derailleur that stops in a certain gear, for example 1-5 works but then 5-6 is a green flash and some noise but does not actually make the shift. If you diagnose any of those this might help.

But since that shifter arm only moves about 60° or so, I was able to take the derailleur cage off, then move the arm 120° around and then go in the app. Now here is where it gets sort of tricky. If it’s stuck in the smallest sprocket follow 1 if in largest follow 2.

1. Go to the rear derailleur in the app, then click calibrate, it will ask if you are in the 6th sprocket which you need to answer with “yes” ( even though you are not). This will offset the zero and will allow you to shift down 5-6 times (11-12 speed). Repeat this step until the arm has come around anbout 120° and you can mount the cage back on.

2. Go to the rear derailleur in the app, then click calibrate, it will ask if you are in the 6th sprocket which you need to answer “yes” ( even though you are not). This will offset the zero and will allow you to shift up 5-6 times (11-12 speed). Repeat this step until the arm has come around about 120 ° and you can mount the cage back on.