LTWOO ER9 & ERX - Electronic groepsets

[jonathanf2]

Weird thing I have noticed. When I tried to fit the chain to the bike after installing the er9, I noticed that the chain was not sitting right on the lower pulley. I suspected that the person who assembled the RD mixed up lower & upper pulley. I switched them and it it's all good now.

But, when searching pictures of the groupset after just by curiosity, I found pictures of both configurations.

Does anyone have an explanation to that?

I don't think it matters all that much. Though my came with the bigger 12t lower pulley wheel and the small 11t upper pulley wheel. I did notice the pulley wheels swapped in various photos, but in operation my arrangement shifts fine.

[Tijoe]

FYI.  I have put 100 miles on my new Wheeltop EDS TX Disc kit.   I am very impressed with the quality and how good the EDS TX is working.   The only thing I dislike is the ergonomics of the shift paddles on the right shift/brake lever.  My fingers are having a hard time hitting the right button now and again, and more often on single track trails when the bike is bouncing around.  I presume that as I get used to the paddle operation, it will become more second nature and I will mess up fewer shifts.

I was a lot more impressed with the disc caliper's stopping power than I thought I would be.   

I was thinking about the ER9 or ERX, but I am sold on the EDS TX kit now.   I hope the WheelTop products become more readily available in the USA, I have another bike I want to upgrade.

[jonathanf2]

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.

[Serge_K]

Weird thing I have noticed. When I tried to fit the chain to the bike after installing the er9, I noticed that the chain was not sitting right on the lower pulley. I suspected that the person who assembled the RD mixed up lower & upper pulley. I switched them and it it's all good now.

But, when searching pictures of the groupset after just by curiosity, I found pictures of both configurations.

Does anyone have an explanation to that?

the lower pulley has a narrow / wide teeth config, so you have to feed the chain correctly. i guess it helps with shifting quality?

[Benbenben]

Well, I had to swap the pulleys. 11 speed chain was blocking in the cage plate with the big pulley installed in the lower position. I am surprised if some of you were able to run the chain through with that config.

[jcr]

Latest coupon is out AED369 $50 off

[coffeebreak]

Unlike Anniversary sale, the EGR this time is ~$1 cheaper than ER9. Both down to $370 - $50 coupon. The deal is back. On the other hand all EDS TX groups from 2-3 different vendors that I had added to cart before sale have expired just today. So no dice on them at least in the USA.

[jonathanf2]

At this sale price point, I'd consider getting a spare ER9 groupset. I really need to stop looking at AliExpress! lol

[Sebastian]

the lower pulley has a narrow / wide teeth config, so you have to feed the chain correctly. i guess it helps with shifting quality?

+1 on that
Mine has the pulley with the narrow/wide teeth in the lower position.
I swapped my cheap aluminium/steel hybrid cassette for a ZTTO lightweight one piece steel cassette. It has absolutely transformed the shifting and it‘s now WAAAY better, quicker, quieter and smoother. Only confirms my assumption that these cheap cassettes are not worth it. (Mine was the Goldix one but they’re all the same I think). But even more so, I’m only realising now how much this has hampered my er9 groupset. It’s soo much better now. Amazing.

[coffeebreak]

They are all same. I bought different brands and noticed that the lockring on which brand name is printed comes in its own little pouch sticky-taped to main cassette body. One manufacturer is producing those cassettes and ZTTO, Wuzei, Goldix, Sunshine just add brand lockrings on top and make it theirs. Those mid range lightweight cassettes are really good. I am yet to try scary light cassettes like Riro branded.

[Sebastian]

They are all same. I bought different brands and noticed that the lockring on which brand name is printed comes in its own little pouch sticky-taped to main cassette body. One manufacturer is producing those cassettes and ZTTO, Wuzei, Goldix, Sunshine just add brand lockrings on top and make it theirs. Those mid range lightweight cassettes are really good. I am yet to try scary light cassettes like Riro branded.

Naah, Thanks. 250g for a 11-34 12sp cassette is light enough for me. I’ll steer clear of steel/aluminium cassettes from Ali for the time being.

[coffeebreak]

At this sale price point, I'd consider getting a spare ER9 groupset. I really need to stop looking at AliExpress! lol

I ordered for the second time this afternoon after first purchase debacle. The groupset literally shipped in 1 hour after placing the order. I *really* hope they have removed the batteries this time.

[Avalius]

Group installed here, raced with it. Trained with it and I have to say wow very impressed with what I got for the money. Shifts better than my old dura ace 11v di2.
Running 12s with a cheaper 11-28 cassette (219gr).

[Finkster]

Did anyone have to contact 80's Designer store for a warranty issue? I messaged the store but didn't get any reply regarding a batt problem.

My ER9 (bought Nov 2023) seems to have a battery drain issue which depletes the batts about 10% everyday without any riding.  Batts are new Vapcell F12 and all firmware updated.  Compared to another ER9 set that I got in Feb 2024 which drains maybe 1% per day which probably seems to be the norm.

Anybody have a similar experience?

[zerstorer]

Is something waking your er9 from time to time?

Also check if the battery was fully charged in the first place. On some power banks the charging may stop but the batteries may not be at 100%. Always visually confirm the battery percentage in the app before unplugging the charger.