LTWOO ER9 & ERX - Electronic groepsets

[Sebastian]

The eGR RD has a clutch, right? Wouldn’t the higher chain tension impact front shifting. Does it work reliably? I’d imagine it’s like with Sram’s mechanical 1x RDs. You can’t combine these with an FD AFAIK. Never tried it but I can’t imagine that it’d work with that amount of chain tension.

[Bigbobby1482]

The eGR RD has a clutch, right? Wouldn’t the higher chain tension impact front shifting. Does it work reliably? I’d imagine it’s like with Sram’s mechanical 1x RDs. You can’t combine these with an FD AFAIK. Never tried it but I can’t imagine that it’d work with that amount of chain tension.

It works fine. GRX 2x RD also has a clutch. Shimano also has MTB groupsets with clutch and they work fine

[SillyMochi]

The GRX 2x "only" has to work with an 11-34/36t cassette. I could still see issues with larger cogs say 42t or even 46t. Limiting 2-3 cogs on either extreme end as suggested by lavistaa could help with the issue and still allow for a huge capacity.
But we won't know for sure until someone tries it for real.

Someone! Try it! Now! 

[SirBikealot]

i'm running 50-34 and 11-42 on my GRX 400 and a clutch in on makes a hugh differnce in chaining up gears from the middle of the cassette. But as the RD moves a lot further away to compensate for the 42 dinner plate in the back, at least for me the switched on clutch is no longer needed on gravel stuff.

so if the EGR has a clutch switch, the off position should work fine.

[SillyMochi]

My understanding of the EGR dampening system is, that it is "always on" and there is no off-switch - neither physically nor digital.

[amacal1]

My understanding of the EGR dampening system is, that it is "always on" and there is no off-switch - neither physically nor digital.

You are correct. Whatever it has, it is not selectable.

I don't think it has a clutch at all. It feels like it just has a very stiff spring. It's possible there is some damping, but it's not discernible just from feeling it with your hand.

[SillyMochi]

Ltwoo states it is a "structure composed of a unidirectional bearing and metal friction plates. It works by utilizing the friction of metal plates to absorb the excess chain jitter" - so probably a glorified spring 
source: https://www.ltwoo.com/Technologies/details?partId=13&specialId=13

I couldn't find much else on the web. Their manual doesn't even include the word "dampening", yet alone an explanation what it does or how it works.

[amacal1]

Ltwoo states it is a "structure composed of a unidirectional bearing and metal friction plates. It works by utilizing the friction of metal plates to absorb the excess chain jitter" - so probably a glorified spring 

Yeah, the spring tension is higher than a road derailleur, but if that statement is true then maybe there's some amount of damping too.

[Sebastian]

Quick update on my battery draining issues: So I received my replacement RD from 80 Designer Store. Again, kudos to them for respecting their warranty. I only paid around 10 EUR for shipping.

I installed the new RD, paired everything and the issue is gone. The new RD received a firmware update right away, so it's running on a different (newer) version than the old one. Anyway I've had it on the bike for a whole day now and the battery level has not changed. It remained at 77% throughout whereas with the old RD, it would drop at least 15% within the first 12-24h and then much quicker after that. The batteries are the same.

[Markus_HiHo]

Are there any updates for version 2.0? Which store can you recommend?

[jonathanf2]

For anybody running LTwoo groupsets in the US, I'd recommend ordering some 14500 batteries now. It seems stock is running dry, possibly due to impeding tariffs coming next year. I was planning to buy spare batteries from my go-to Ebay vendor and it looks like they're all sold out.

BTW - I just received an EGR groupset, but I think I'll be keeping it 1x for my gravel setup! 

[nabilou]

what is exactly the point of the erx groupset?
i miss something.
a full new 105 di2 with crankset cost around 890 euros in europe.
erx is not specially cheaper and not specially lighter

[Sebastian]

what is exactly the point of the erx groupset?
i miss something.
a full new 105 di2 with crankset cost around 890 euros in europe.
erx is not specially cheaper and not specially lighter

er9 is where value for money lies. I found it to usually cost 2/3 or less than 105 Di2.
However, 105 Di2 and Sram Rival AXS are getting cheaper and cheaper. Which is another answer to your question: The point of Ltwoo and Wheeltop is that it forces established manufacturers to lower their prices to stay in competition. Well, and hopefully Ltwoo and Wheeltop up their game when it comes to reliability in the future.

[nabilou]

ok but what is the best price you find ?

[raisinberry777]

ok but what is the best price you find ?

In the most recent sale ER9 was 350USD from the L-Twoo Factory choice store. That's for shifters, brakes, derailleurs and batteries/wires.