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Re: LTWOO ER9 & ERX - Electronic groepsets I've also been riding my ER9 groupset without a hitch and I ride on some rough road terrain and it just works. I have my ER9 gear tuned perfectly, quality replaceable batteries are cheap/plentiful, the high speed shifts are faster than any of my mechanical bikes and gear protection does a great job minimizing chain drops + keeping chain line optimized. On price alone I would probably get another ER9 groupset. No complaints on brakes either, they work fine.

April 14, 2024, 01:28:47 PM
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Re: LTWOO ER9 & ERX - Electronic groepsets At this sale price point, I'd consider getting a spare ER9 groupset. I really need to stop looking at AliExpress! lol
April 15, 2024, 11:52:26 AM
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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
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Re: LTWOO ER9 & ERX - Electronic groepsets
In the last few days, the er9 RD of a friend died for no reason. Got stuck in the hardest cog and nothing will make it shift, including reset, unplugging, replugging and everything i could think of. The FD works fine.
Then today, went for a ride with my gravel bike, and my own RD died exactly the same way! I went down a descent with bad asphalt and vibrations, at the end of the descent, dead RD.
I'm trying to get a response from l-twoo via the intermediary that sold me the groups, I'll keep you posted.
But as of right now, I'm extremely unhappy and would not recommend er9/erx because a bike has to work, if you can't trust your derailleur to shift, then buy something else.
I'll post updates.
TWO DEAD er9 RDs in one week under normal use.

Keep us posted if you're able to get a replacement RD. I wonder what other issues might be affecting the ER9/X besides water ingress. Does extreme vibration mess with the RD motion sensor, causing it not to wake from sleep mode?

April 20, 2024, 10:02:01 AM
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