LTWOO eGR

[trcycling]

Rapid drain or charge status failure


I did get my eGR remounted properly in the seatpost (vs external before) of the new (to me) bike. Thanks for the advice earlier. So much nicer looking that way.

BUT, I got an unhappy surprise on my ride today when it died.  I last checked via app about a week ago and it showed 65% I went on a 41 mile ride and hung it upside down for a few days. Went out this morning and it died 2 miles in. Once I applied power and could reconnect it was indeed at 4% dead. 

So it appears that one of two things happened:

1) 65% indicated is erroneous and should be considered very low. FWIW, I reinstalled it showing 74% and did not charge at that time. 71 miles later it showed 65% which seemed pretty reasonable. Deat at 112 miles. (I don't have shift count but that 41miles in between was a heavier than average shifting exercise. Note: I took the 'bring your own battery cell' approach when ordered. So I'm aware that a different cell than the manufacturer calibrated on (even in spec) could be the problem. But I suspect a lot of people buy it this way since the LiOn shipping costs are so high.

2) A wild theory: Hanging it upside down for storage keeps the motion-sensing RD alive and drains the battery. PURE THEORY but it seems possible.

Does anyone have thoughts?

[amacal1]

Rapid drain or charge status failure



So it appears that one of two things happened:

1) 65% indicated is erroneous and should be considered very low. FWIW, I reinstalled it showing 74% and did not charge at that time. 71 miles later it showed 65% which seemed pretty reasonable. Deat at 112 miles. (I don't have shift count but that 41miles in between was a heavier than average shifting exercise. Note: I took the 'bring your own battery cell' approach when ordered. So I'm aware that a different cell than the manufacturer calibrated on (even in spec) could be the problem. But I suspect a lot of people buy it this way since the LiOn shipping costs are so high.

2) A wild theory: Hanging it upside down for storage keeps the motion-sensing RD alive and drains the battery. PURE THEORY but it seems possible.

Does anyone have thoughts?

1) This may be dependent on your battery. But I can regularly get MANY more than 112 miles out of a charge. Also, 65% is not anywhere near dead for me. Again, assuming your unit is otherwise not damaged, it could be that your battery cells are responsible for this.

2) I can't speak for hanging "upside down", but I sometimes store mine by hanging it 90deg against a wall (hanging it on a wall by the front wheel) and I have not experienced any draining.

[jonathanf2]

I just got back from a weekend bug out in the desert. I threw all of nature at my LTwoo EGR and the groupset held up like a champ. At this point if people are having issues with their hardware, please just use your local bike shop! Blows my mind with all the whiny cyclists on this forum who start raging when life gets a bit difficult! 

[sOKRATEs100]

Hi,

will this groupset fit for my TanTan GR040 (http://www.tantancycling.com/index.php?_m=mod_product&_a=view&p_id=841) with flat mount holes?

Many thanks, Dennis

[jonathanf2]

Hi,

will this groupset fit for my TanTan GR040 (http://www.tantancycling.com/index.php?_m=mod_product&_a=view&p_id=841) with flat mount holes?

Many thanks, Dennis

It should fit fine. Worst case scenario is that you'll have a very close fit trying to tighten the screws on the rear brake adapter + caliper. Also don't over tighten the screws on the adapter plates, I've already stripped the thread on two of them. I bought extra adapter plates from 80 Design store as backup. It's the only downside to the eGR brake caliper design, despite being very good brakes (probably the best I've tried).

[trcycling]

Sooooo, is anybody else having problems charging your system? 

Everytime I have to charge my eGR, it is a hassle. Twice I've had it started only to come back later and find that it didn't charge. Not only that but trying to get a connection is maddening. It just doesn't want to.

So what have I tried:

• I have two cables and both have the same challenges. I know to check the USB A side and make sure to have a green light before trying. (I do forget between times that when it is charging, that changes to red)
• I make a point to clean the contact on the RD. (Please tell me why an exposed contact is facing up?) I also clean the cable end. I've used fingers, towel, a soft brush etc.
• Repeated attempts to make contact. The magnet snaps but over and over no light. Or a brief light then nothing

Any tips? Am I doing something wrong? Is this a defect I should be trying to warranty?

[jonathanf2]

Sooooo, is anybody else having problems charging your system? 

Everytime I have to charge my eGR, it is a hassle. Twice I've had it started only to come back later and find that it didn't charge. Not only that but trying to get a connection is maddening. It just doesn't want to.

So what have I tried:

• I have two cables and both have the same challenges. I know to check the USB A side and make sure to have a green light before trying. (I do forget between times that when it is charging, that changes to red)
• I make a point to clean the contact on the RD. (Please tell me why an exposed contact is facing up?) I also clean the cable end. I've used fingers, towel, a soft brush etc.
• Repeated attempts to make contact. The magnet snaps but over and over no light. Or a brief light then nothing

Any tips? Am I doing something wrong? Is this a defect I should be trying to warranty?

Clean your battery cable and RD magnetic port. I periodically wipe both down with a cotton swab and alcohol. After camping trips, my RD is very dirty so I find the alcohol does the trick cleaning debris on the magnetic port.

This should hopefully fix your issue! 

[trcycling]

Clean your battery cable and RD magnetic port. I periodically wipe both down with a cotton swab and alcohol. After camping trips, my RD is very dirty so I find the alcohol does the trick cleaning debris on the magnetic port.

This should hopefully fix your issue! 

Unfortunately, I have done both several times, on both cables I have. Still unstable. If I keep trying it over and over it will eventually connect

[gloscherrybomb]

Sooooo, is anybody else having problems charging your system? 

Everytime I have to charge my eGR, it is a hassle. Twice I've had it started only to come back later and find that it didn't charge. Not only that but trying to get a connection is maddening. It just doesn't want to.

So what have I tried:

• I have two cables and both have the same challenges. I know to check the USB A side and make sure to have a green light before trying. (I do forget between times that when it is charging, that changes to red)
• I make a point to clean the contact on the RD. (Please tell me why an exposed contact is facing up?) I also clean the cable end. I've used fingers, towel, a soft brush etc.
• Repeated attempts to make contact. The magnet snaps but over and over no light. Or a brief light then nothing

Any tips? Am I doing something wrong? Is this a defect I should be trying to warranty?

I had this problem and it turned out that it needed a powerful wall unit (like you have for a smartphone) and it wouldn't charge properly off a weaker unit or a laptop usb port, for example.

[Serge_K]

Unfortunately, I have done both several times, on both cables I have. Still unstable. If I keep trying it over and over it will eventually connect

I'm with you, it's just shit. Very frustrating, even when using a legit charger plugged into the wall rather than a battery pack.
I'm running a new ERX RD, and the charging is still shit.

[jonathanf2]

I just apply a bit of pressure on the battery connector and wait for the light to start flashing. Clean my connectors on a regular basis with an alcohol damp swab. All three of my LTwoo groupsets have been holding up.

[gloscherrybomb]

Some great discounts available on aliexpress right now, especially if you use all of the available vouchers and cashback.

[trcycling]

New Version of LTWOO eGR Derailleur?


So, I wrote to my reseller (80 Designer Store on Aliexpress) about the charge problem. They promptly replied offering a warranty replacement for a nominal shipping charge ($15). Deal. But they 'warned' me that they only had the new, 10-50t version. Uhhhh, excuse me? Sure, send it. Awesome response

It arrived today (about a week). It is indeed a different version. The cage now measures 90mm bolt to bolt where the original one was only 83mm. That seems to suggest that it could support 50t now. But I cannot fine ANY reference to such a thing anywhere in the English web. The LTWOO mechanical RD can do it but the product page still says 46t for eGR.  I cannot observe any other differences to the earlier version (delivered in May 2024). It does weigh 15g more and 7mm of cage doesn't account for that. The app does not differentiate their versions either.

Has anyone else heard of an update. I've been looking at reports from Taipei bike show but nobody has mentioned it that I've seen yet.

[raisinberry777]

Lucky find! I think that's news to everyone. Any other obvious visual differences or just a longer cage?

[trcycling]

I can't see anything and I've looked at them side by side.

What I have noticed is that it works with my 10-50 WAY better. (Yes, I know I was running it out of spec). I haven't had it on the road yet but what I've noticed is:

• Almost no B screw tension to put it in position on a 50t. With V1, it needed nearly full extension
• On the stand, shifting at the bigger cogs seems crisper
• The initial calibration point is WAY off. But it was on the V1 as well. The position for gear 1 lines up about the 5th cog.  Easy enough to fix with the initial calibration but it makes one think it's messed up at first. Once calibrated, no micro adjustment needed on a Garbuaruk 11s

We'll see on the road tomorrow I hope.