LTWOO ER9 & ERX - Electronic groepsets

[hubertus]

I'm using Skywolfeye 14500 Battery 1200mAh Li-ion 3.7V Rechargeable batteries and they've been working great.

https://www.ebay.com/itm/155465836365

I do wonder if batteries make a difference with some of these bad ER9 groupsets? It's the only major variable besides environmental conditions and riding style (race, commuter, etc.). Perhaps bad batteries could cause RDs to fail?

Yes, I can confirm the batteries are an important part. The issue of not being able to charge for more than 10 seconds immediately changed after replacing them. During the fixing process, it was also quite obvious that the charger is quite important. I had multiple rides in a row where the derailleur died mid-ride (even though charging them during the night). I will circle back after the next couple of rides to see whether the issues continue.

[Sebastian]

I'm based in Germany. I used cells from German company (reseller?) PATONA. They do all kinds of batteries including big ones for e-scooters and e-bikes. They were slightly more expensive - something like double the price of the cheap stuff on Amazon. But they're working reliably. I guess you really shouldn't save money on the battery.

[hubertus]

On a different topic, does anybody know which OSPW is compatible with this groupset? Not too long ago, I placed LTWOO's OSPW on an indoor bike, and the difference in sound is dramatic. Can we use the same one, and if so, which version specifically?

[GiantRider]

i used to use a battery pack thinking it was charging, it wasn't really. I've been using a wall socket, works much better. I wouldn't charge less than once a week though, the battery doesn't last that long (I did use $hit batteries, to be fair, i tested their capacity at 320-380mah each).

Thanks for this.  I ended up getting these:  EBL14500 3.7V 800mAh Li-Ion Rechargeable Batteries from walmart.com. So far so good!

[GiantRider]

Issues with 12 speed cassettes.  I am having a problem getting it to shift into the last 11 tooth cog on two different wheelsets.  I have backed off the limit screw so much that it has over-shifted on the outboard side so I don't think the limit screw is the problem.  It will actually shift to the 11 and then about 2 seconds later it shifts back up to the 12.  if i hold the button down, it will stay in the 11 but as soon as I release the shift button, it shifts back to the 12.  I did replace the wonky looking narrow/wide type pulley with one from a 6800 ultegra derailleur I had laying around.  That helped shifting all over but the 11 cog is a mystery.  When I use an 11 speed wheel and change it to 11 speed in the settings, it has no issue shifting the entire range.

[amacal1]

Issues with 12 speed cassettes.  I am having a problem getting it to shift into the last 11 tooth cog on two different wheelsets.  I have backed off the limit screw so much that it has over-shifted on the outboard side so I don't think the limit screw is the problem.  It will actually shift to the 11 and then about 2 seconds later it shifts back up to the 12.  if i hold the button down, it will stay in the 11 but as soon as I release the shift button, it shifts back to the 12.  I did replace the wonky looking narrow/wide type pulley with one from a 6800 ultegra derailleur I had laying around.  That helped shifting all over but the 11 cog is a mystery.  When I use an 11 speed wheel and change it to 11 speed in the settings, it has no issue shifting the entire range.

Which front chainring are you in while you're attempting this? Is it, perhaps, trying to prevent cross-chaining and shifting to the same ratio but with a different front chainring?

I believe I read a post where someone was pulling their hair out over their Wheeltop electronic derailleur doing something like this before realizing it was a feature not a bug.

[jonathanf2]

Issues with 12 speed cassettes.  I am having a problem getting it to shift into the last 11 tooth cog on two different wheelsets.  I have backed off the limit screw so much that it has over-shifted on the outboard side so I don't think the limit screw is the problem.  It will actually shift to the 11 and then about 2 seconds later it shifts back up to the 12.  if i hold the button down, it will stay in the 11 but as soon as I release the shift button, it shifts back to the 12.  I did replace the wonky looking narrow/wide type pulley with one from a 6800 ultegra derailleur I had laying around.  That helped shifting all over but the 11 cog is a mystery.  When I use an 11 speed wheel and change it to 11 speed in the settings, it has no issue shifting the entire range.

I'm running a 12 speed cassette with no issues. Check your lower limit screw and also try fine tuning in the app. I have my ER9 tuned using gear protection and optimal shifting for climbing in my small chainring. Though I can shift big/big and small/small no issue.

Also check that your derailleur hanger is aligned properly and that your cassette is seated properly in the freehub. I've noticed 12 speed is a bit more finicky so any little thing out of adjustment can affect shifting.

Worst case scenario is reset all settings using the app and start fresh. Make sure to double check if your RD is properly screwed into the derailleur hanger. Good luck!

[jonathanf2]

Just to verify, you're on a 12 speed chain right? 

[GiantRider]

I'm running a 12 speed cassette with no issues. Check your lower limit screw and also try fine tuning in the app. I have my ER9 tuned using gear protection and optimal shifting for climbing in my small chainring. Though I can shift big/big and small/small no issue.

Also check that your derailleur hanger is aligned properly and that your cassette is seated properly in the freehub. I've noticed 12 speed is a bit more finicky so any little thing out of adjustment can affect shifting.

Worst case scenario is reset all settings using the app and start fresh. Make sure to double check if your RD is properly screwed into the derailleur hanger. Good luck!

It's not a limit issue that I can tell but I will double check. When I back out the screw it will over shift outboard. I can adjust the trim on the 12 cog to go over to the 11 and it will stay there, but it will not shift to the 11 and stay,  I do not have gear protection turned on and it is doing the same in both chainrings up front.  Next stop is the factory reset and redoing the 6th gear calibration.  Or swap back to the 11 speed cassette.  Yes, I use 12 speed chains on all my bikes.

[zerstorer]

Try the seventh gear recalibration.

[jonathanf2]

You could have a bad 12 speed cassette. I would try another 12 speed cassette if possible, do a hard reset on the groupset and see if that will help. If it shifts an 11 speed cassette fine, it should work fine for 12 speed.  Something tells me the issue must be hardware related. So you'll have to do your best to narrow down the possibilities.

[GiantRider]

You could have a bad 12 speed cassette. I would try another 12 speed cassette if possible, do a hard reset on the groupset and see if that will help. If it shifts an 11 speed cassette fine, it should work fine for 12 speed.  Something tells me the issue must be hardware related. So you'll have to do your best to narrow down the possibilities.

Thanks everyone for the suggestions, it is working!!  A combination of doing the factory reset via the app and performing the calibration again was the trick.  Speaking of hinky cassettes, I think both of my Ultegra cassettes are weird in different places.  I get some chattering in a couple of places on one and the other has a bad tooth on the 16 cog that needs some shaving, but other than that, I can shift equally well on ER9 and Ultegra. 

[kbernstein]

Bit of a shower thought, what is stopping LTWOO (and shimano for that matter because they are 100% in the same boat) from pooping out a MTB shifter? 95% of the research and development is done already with the road groupset, wouldn't they just have to rewire the electronics into a dropbar shifter and merge their MTB derailleur with the clutch and the eGR derailleur? No complicated STI, no front mech etc. What is stopping them, patents?
Also, why not supply titanium bolts for ERX? Would cost them at most another $10 to produce for an easy 50 gram save which would make it competitive with stock duraace in terms of weight

[toxin]

Ltwoo already have flatbar electronic shifters in their cazalogue, just dont seem to be selling them yet

[amacal1]

Ltwoo already have flatbar electronic shifters in their cazalogue, just dont seem to be selling them yet

Yes, and they already are selling a MTB style e-shifter with their universal electronic shifting system (that retrofits to mechanical derailleurs).

I'm kind of interested in how cross-comptaible all their wireless electronic gear is. For instance, is it possible to integrate their current mtb style shifter with the eGR or eR9/eRX system? For that matter, does an eGR shifter work with the eR9/eRX?

I know some people have bought eR9 and eGR at or around the same time. I'm really hoping someone tries swapping some of these parts and can report back.