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Re: LTWOO ER9 & ERX - Electronic groepsets i think i posted on this thread before the weight difference. Marketing materials from L-twoo attached.
Er9 is not locked to 11s.
August 08, 2023, 08:40:42 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets Another masochist eR9 beta tester chiming in:

As with the user above I also had sub-optimal interactions with their customers service, with typically 1 business day gaps in the reply time, so getting a replacement part which I had damaged took a total of 5 days to be dispatched.

Regarding the shifting performance, it's quite good. A few rides so far and no missed shifts or issues with the groupset not waking up.
Shifting under load up to 200w is crisp and the app integration is very good. Being able to adjust each cassette and chainring offset through the app is fantastic for setup, during my first ride I was able to whip the phone out and fine tune the trim whilst riding.
Regarding the trim function, I'm not sure if it is a result of the latest update but you can now trim in both directions (however) the trim direction is not controlled by the user. Essentially whenever you hear front chain rub, pressing shift again will trim the FD if the system determines it needs trimming, and there seems to be several steps. I.e if I shift from the 11th cog to 9th there is a trim step, then 9th to 3rd it will trim again, then the same the other direction.

Install wise it was easy, not having to run gear shift cables saves some grey hairs especially if you're fully integrated. The YouTuber Klein concept has a solid 90min install video which walks through all the steps.
September 23, 2023, 09:52:40 PM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets I've just spent 6 days riding out to watch each stage of the Tour Down Under with my full AliExpress build, including er9 12 speed set up. 600km and 7000m of climbing and it didn't miss a beat. Still no rides in the wet but given other reported issues I added silicone around where the cables plug in to enhance the waterproofing.
January 21, 2024, 05:41:25 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets I've installed 5 ER9 groups in the last 2 weeks. 1 gave me issues for some reason, but it was my fault. Make sure the limit screws are set properly, as well as the 3rd screw that sets the tension on the cage. The RD protects itself very quickly, so if any of the 3 screws are off, the cage wont shift. It's given me a new appreciation for my own incompetence and the fact that stuff usually works as long as it's installed and setup properly. During the builds i'm often thinking "this is such POS" but then an hour later, or a week later, i realize it's just me being incompetent / thick / tired.
Did you unplug and reset? battery's charged?
If you remove the wheel, does the RD shift? Are both FD & RD running the latest firmwares?

EDIT: setting the 3 screws and calibrating the gears (as well as the FD) is somewhat of an iterative process. If you change a limit screw, your calibration of the RD is likely to need updating. I wont pretend that I understand how everything affects everything, but the point is the moment you change the tension on 1 screw, there's a decent chance the rest of the system is affected. And if ONE thing is off, everything can be off, and the RD tends to protect itself and refuse shifting until it's happy with alignments and what not.
February 19, 2024, 09:39:54 AM 		1
Re: Seka Exceed RDC Broken Frames: Source of Concern? You can see the photos of the windtunnel testing setup here: https://imgur.com/INTX8Ca

It seems pretty basic. Wheels handlebar and frame that's it. It was made fun of because its so basic, but that basic testing in the tunnel is about a lot more than marketing; it should be part of the development process to get real data that confirms the models they are using to develop the bike; the same way that you test to confirm the results of FEA. Sharing the pictures and the plots IS marketing since the results are likely to be not very representative to a rider. Ideally, they would have also tested rider interactions and had components attached to the bike, but that is yet another level of complexity and a different run of testing, which would add additional cost.

However, saying that the process to validate models was done at all is a sign of a more mature engineering process. To me thats a big deal and huge step towards closing the gap to big brands.
February 20, 2024, 09:18:04 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets
Quote from: Ronronson on March 17, 2024, 11:48:44 AM
What's the general feeling towards ltwoo erx in spring 2024? I've been tempted to pull the trigger on a number of occasions but too many of the YT influencers saying it's not a finished product, has inherent problems etc ( maybe ltwoo aren't paying them enough to endorse). Aliexpress have a sale this week, never been a better time to buy however I value reliability over anything.
If you value reliability over ANYTHING, then buy Shimano.
YouTubers often receive early units and they serve as beta testers. Bad strategy? These YouTubers had the battery with tabs and not springs, which caused most of the concerns.
Your concern over shilling is also warranted. Anybody who has a discount code on anything has an interest in you spending more, mathematically. And so if you don't see a discount code on l-twoo, they don't stand to benefit, which is worse. If they don't make money from it but then users report problems, then they just shit themselves in the foot twice.
I'm very happy with my 5 er9, but I kind of want them to fail to see what happens. I enjoy the tinkering and the grind of making my own bike infinitely more than buying off the shelf pre packaged branded stuff. Shimano for me is a patent troll and SRAM is the worst assemble of engineers in recent bike history, so I will get out of my way to try alternatives.
I still use a Shimano group on an old bike. That stuff will never die. You probably should buy Shimano if your key concern is reliability. L-twoo electric groups didn't exist a year ago. Nobody can tell you how they age long term. They may age like fine wine, they may age like Lindsay Lohan. Do you want modern day Lindsay Lohan on your bike?
March 17, 2024, 01:57:42 PM 		1
Re: WheelTop EDS TX Full Wireless Groupset (Chinese SRAM)
Quote from: Tijoe on April 09, 2024, 12:02:38 AM
I must be lucky/special.

Has anyone written the 2 sellers and asked why they can't/wont sell to customers in the USA?  Since one of them sold one to me, perhaps they can be convinced to ship to the USA.

Based on youtube videos i've seen, L-TWOO has removed features that were patent pending. The auto trim is one that comes to mind. But Wheeltop seems to be much more reckless about that (I think with Sram related features especially, I think?). I'm not interested in that group so havent been paying close attention, but that's the impression i got. And the US is the land of lawsuits. And US cyclists keep complaining that road cycling is dying there, vs Asia is on the rise, and Europe is its birth place. And Sram is affordable in the US, while it's not in Europe.
So that's my 5 cents.
What i dont understand is why these channels are touting wheeltop electronic as the di2 killer when it's worse than l-twoo's erx in more ways than 1 (worse app, no garmin integration just to name two), and the er9/erx just works great, and having installed 5 and used 2, it feels premium alright (the rubber on the hoods for example, is great).
April 09, 2024, 09:13:38 AM 		1
Re: LTWOO ER9 & ERX - Electronic groepsets 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!
April 19, 2024, 12:41:13 PM 		1