LTWOO eGR

[MrMojo93]

[quote author=amacal1 link=topic=4684.msg78563#msg78563 date=1744039423

I'm not sure how well a second battery holder will work out, since the battery holder is meant to be stored in the seat post. I can't imagine two battery holders could ever fit, so where would you keep the second one and how would you affix it?

[/quote]

I meant a battery holder for eRX, since the eGR battery holder has just on outlet, an I need one for the FD as well, so I would use only 1 battery just not the original one.

What is the difference between the eR9 and eGR brifters?

[jonathanf2]

[quote author=amacal1 link=topic=4684.msg78563#msg78563 date=1744039423

I meant a battery holder for eRX, since the eGR battery holder has just on outlet, an I need one for the FD as well, so I would use only 1 battery just not the original one.

What is the difference between the eR9 and eGR brifters?

I'm not sure 2x shifting would be great using the eGR. As an experiment, I mounted a 2x 46-30t chainring on my eGR gravel bike and manually shifted the chain on each chainring. What I found is that you're forced to put more cage/cog distance using the B screw. It results in less than ideal shifting especially at the high gears. I guess there are other hacks to get better range, but it just gets overly complicated.

[amacal1]

I'm not sure 2x shifting would be great using the eGR. As an experiment, I mounted a 2x 46-30t chainring on my eGR gravel bike and manually shifted the chain on each chainring. What I found is that you're forced to put more cage/cog distance using the B screw. It results in less than ideal shifting especially at the high gears. I guess there are other hacks to get better range, but it just gets overly complicated.

I have the eGR with a 50t cassette and the b-screw is backed off as far as possible to allow the cassette to fit, and I also experience the less-than-ideal shifting performance. Not bad, per se, just not ideal. It still accurately shifts, just not as quickly.

[MrMojo93]

I'm not sure 2x shifting would be great using the eGR. As an experiment, I mounted a 2x 46-30t chainring on my eGR gravel bike and manually shifted the chain on each chainring. What I found is that you're forced to put more cage/cog distance using the B screw. It results in less than ideal shifting especially at the high gears. I guess there are other hacks to get better range, but it just gets overly complicated.

I have 46/33 front and only 11-36 on the back currently, I might need 40-42 tops, so that would work I think even better with the slightly longer cage of the newer version

[trcycling]

You'll have to add a FD somehow, so you'll be purchasing that separately from the eGR since the eGR was technically never meant to be paired with a FD. It's only though some minimal testing by others that it seems it *might* work together. If you are deadset on trying it, I would suggest maybe buying a fire-sale eR9 groupset. You can use the single battery pack from the eR9 that has 2 outputs as well as the eR9 FD. You'll also get eR9 brifters. If you are able to find one, then, all you would need is an eGR rear derailleur. It might not be that much cheaper than a full eGR groupset, so maybe you could just buy a full eGR groupset and sell whichever pair of brifters and brakes you don't want and keep all the rest?

IF you want to go ahead with a wide-range rear cassette and/or "clutch" like on the eGR RD, I think that's probably the way to do it.

What you need to do it is the dual-port battery that comes with the road group. The eGR version only has a single port to power the RD. Getting the road set would include that and the shifters/brakes. And then you need the eGR or MTB RD. Supposedly LTWOO will support pairing across product lines. Confirmation on that seems thin though. If I get a chance at Sea Otter I'll try to remember to ask someone. 

[MrMojo93]

IF you want to go ahead with a wide-range rear cassette and/or "clutch" like on the eGR RD, I think that's probably the way to do it.

What you need to do it is the dual-port battery that comes with the road group. The eGR version only has a single port to power the RD. Getting the road set would include that and the shifters/brakes. And then you need the eGR or MTB RD. Supposedly LTWOO will support pairing across product lines. Confirmation on that seems thin though. If I get a chance at Sea Otter I'll try to remember to ask someone.

I have wrote to the official LTWOO support, they said that eGR does not support a FD, Tracevelo said that the brain of the operation is the RD, but I don't think that the inside electronics are so different than the eRX. I might try to ask him to test this, he has every LTWOO electronic groupsets.

Why do you think that it would be better to buy an eRX groupset and an eGR RD? Apart from that, that I would surely have a working 2by system, but I would like to have the eGR brifters, they might be better optimized for gravel.

Thanks! That would be great if someone could verify that this actually works

[amacal1]

 but I would like to have the eGR brifters, they might be better optimized for gravel.

Thanks! That would be great if someone could verify that this actually works

1) I'm actually not sure about which brifters would be better. I find the eGR brifters to be uncomfortable. They're thinner and have hard rubber. The combo makes them hard on my hands. The only thing that might be improved is weather sealing (no real indication, just a guess) and the button response (confirmed that eGR is 'click-ier' while eR9 is 'soft-er'). I believe the new eR9 v2/3 brifters are reported to be fatter and more comfortable while also having the more tactile 'clicky' buttons.

2) If you dig through either this thread or the eR9/eRX thread, you should find that someone has already tested (minimally) and found it works. I don't recall that they actually ran the system to flush out any potential issues, only that they paired various brifters, FD, and RD combos to confirm that all the various pieces and parts communicated and the FD shifted while paired with the eGR RD.

[jonathanf2]

1) I'm actually not sure about which brifters would be better. I find the eGR brifters to be uncomfortable. They're thinner and have hard rubber. The combo makes them hard on my hands. The only thing that might be improved is weather sealing (no real indication, just a guess) and the button response (confirmed that eGR is 'click-ier' while eR9 is 'soft-er'). I believe the new eR9 v2/3 brifters are reported to be fatter and more comfortable while also having the more tactile 'clicky' buttons.

2) If you dig through either this thread or the eR9/eRX thread, you should find that someone has already tested (minimally) and found it works. I don't recall that they actually ran the system to flush out any potential issues, only that they paired various brifters, FD, and RD combos to confirm that all the various pieces and parts communicated and the FD shifted while paired with the eGR RD.

I add extra bar tape on the top section of my LTwoo shifters to make them more comfortable. Also I'll take the eGR brifters over the V1 ER9/X. The haptics on the eGR shift buttons are way better and the brake lever tips are slightly longer, making them easier to use in the drops.

[trcycling]

Why do you think that it would be better to buy an eRX groupset and an eGR RD? Apart from that, that I would surely have a working 2by system, but I would like to have the eGR brifters, they might be better optimized for gravel.

On the requirement to have the dual port battery and FD which are available in the eRX group. So, if the groupset is buyable cheaper than the parts (often the case), that would be efficient. But you could also get eGR and buy a second battery from the eRX group with dual ports and an FD. But that brings up the 'does it really work' with eGR brifters question again. I would have greater confidence (but still unknown) that the eRX 2x setup could talk to an eGR wide-range RD than the eGR 1x brifters (which officially allow you to use left or right to shift the RD but no other combo) to be able to also control the FD. The way pairing works on LTWOO and other wireless systems, it appears that the RD is the master in the system and thus could be the deciding factor in cross comopatibility.