Author Topic: LTWOO ER9 & ERX - Electronic groepsets  (Read 278703 times)

user757

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1425 on: March 07, 2025, 12:19:23 PM »
Ordered an ER9 groupset from here in the US a few days ago, from the LTWOO factory store on AliE. Price hasn't changed since I ordered, supposed to be version 3 according to support agent, $459.
« Last Edit: March 07, 2025, 12:21:33 PM by user757 »

BeR

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1426 on: March 07, 2025, 12:20:51 PM »
Interesting, thanks guys! indeed, to germany using 80 store, you get a price adjustment and the price makes sense. switch to france, and they charge an extra 150+ eur for shipping: doesnt make sense. Using a different store that advertises free shipping to european countries, the same problem with the 150 threshold still shows up at the last minute.
Didnt try a finland address.
Endlessly confusing - i'm building bikes in 3 different countries atm.

VAT can't be excluded on Aliexpress for France. So lame.

Alastair_S1D

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1427 on: March 07, 2025, 12:33:34 PM »
Hi guys, I got the new eRX gen 3 (type c charging)

I've used XTAR 1200mah batteries for it. My first shakedown ride was a 4 hour 130km cycle and about 3.5h into the ride it went flat/stopped working. When I left for the ride it said it had 90% battery.

When I plugged back in after the ride the groupset came back to life it said it had like 80% left.

Any ideas what might of happened here? Does the battery level thing need time to calibrate?
anyone?

jonathanf2

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1428 on: March 07, 2025, 01:30:52 PM »
anyone?

I notice those batteries that get marked with higher capacity discharge prematurely. I've since switched to 800mah 3.7v 50mm height batteries with tab. Since then, no issues with battery drain. It's also a good idea not to trust the battery gauge and charge it overnight just to be safe. A sure method is to use an external charger to charge fully and then install the batteries. That way you know the batteries are good to go and every other charge after will just top off the power.

Alastair_S1D

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1429 on: March 07, 2025, 01:49:57 PM »
I notice those batteries that get marked with higher capacity discharge prematurely. I've since switched to 800mah 3.7v 50mm height batteries with tab. Since then, no issues with battery drain. It's also a good idea not to trust the battery gauge and charge it overnight just to be safe. A sure method is to use an external charger to charge fully and then install the batteries. That way you know the batteries are good to go and every other charge after will just top off the power.

Hmm interesting thanks. I thought the XTAR 1200s would be good quality since I'd seen people had good performance out of the XTAR 800s.

jonathanf2

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1430 on: March 07, 2025, 02:35:40 PM »
Hmm interesting thanks. I thought the XTAR 1200s would be good quality since I'd seen people had good performance out of the XTAR 800s.

With LTwoo electronic, it's best just to stick with the recommended 800mah batteries. I'd also clean both charging port and battery cable with a cotton swab if you notice dirt.

boxof13

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1431 on: March 07, 2025, 05:36:16 PM »
I just received my new eRX from 80 Designer Store. The new shifter ergonomic is such an improvement, in my opinion. It's actually heavier than the old eR9 by almost 15gr for each shifter. I'll take the 15gr penalty for improved comfort. Kind of curious how the new eR9 would weigh compared to the new eRX. It seems like an odd choice if eR9 ends up being lighter than the eRX.

I can confirm that the new shifter can be paired with my other eR9 RD and FD. It's funny I can pair two different sets of shifter for one RD and FD, at the same time.
« Last Edit: March 07, 2025, 06:03:46 PM by boxof13 »

BeR

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1432 on: March 07, 2025, 07:13:48 PM »
Do you think that the new version can compete with a Shimano 105 or Ultegra Di2 groupset ?

Which crankset / cassette do you use ?

boxof13

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1433 on: March 07, 2025, 08:59:20 PM »
Do you think that the new version can compete with a Shimano 105 or Ultegra Di2 groupset ?

Which crankset / cassette do you use ?

Given that you can get the set for reasonable price, I think this can easily compete with 105. I got the eRX for ~$500 after tax, which is still less than what you would pay for 105. Ltwoo needs to drop a bit of weight and add more features like extra button to compete with Ultegra. In terms of functionality, I'd argue the new eRX is already much better than 105 with variable speed, per cog micro adjust, USB-C charging, user replaceable batteries, over the air firmware upgrade (I believe 105 still does not support this either).

The new eRX will be paired with Elilee x310 crankset and ZTTO ultralight cassette. Previously, I was running Racework crankset and Dura-Ace cassette which worked flawlessly. I would expect nothing less from the new combination.

Serge_K

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1434 on: March 08, 2025, 12:28:48 AM »
VAT can't be excluded on Aliexpress for France. So lame.

Well... Death and taxes... Fairness / level playing field... It's not lame. I can't say I like it, but it's something you can order from the toilet to your door in one click. It's competing against bike shops and legit online retailers, subject to VAT, taxes, customer friendly return terms, warranty and so on. I'm all in favour of cutting out middlemen that add little to no value. However, if you start cheating taxes, it's not fair anymore.
The concept of tariffs isn't crazy either. Unfortunately we know that public money is mostly spent poorly, but in spirit, i support the idea of being taxed a little bit on such purchases so that the money goes towards something useful. Idk if it's creating a bit of industry, bike paths, bike events, bike handling / maintenance classes, but in the spirit of fairness, we shouldn't be able to buy shit abroad and pay no VAT / taxes when businesses around us are subject to both taxes and VAT.
Now obviously if there was the option not to pay VAT, i'd pick it, but the idea remains :)


Do you think that the new version can compete with a Shimano 105 or Ultegra Di2 groupset ?

Which crankset / cassette do you use ?

We've broken 4 or 5 ER9 RDs, i stopped counting honestly. But we got early versions. I think the consensus is that when it's working (ie not broken) and well calibrated, it's great.
Caveats: price and relative value. The new ERX on panda podium is 650$, for eg. At this price point, compared to 105 di2, for eg, well... The idea is that i recommend ltwoo if and only if the relative value is a no brainer. And that's a function of jurisdiction, time and so on.
Racing performance: i don't race, and i avoid shifting in shitty situations. So I'm not changing 3 cogs, switching to the big ring, out of the saddle, uphill, suddenly, and panicked. aka, the sort of thing that you do when you race. It's important to flag, because i heard very recent horror stories of pros racing ltwoo er9/erx groups and getting dropped chains, mechanical failures and the likes. I am not saying that ltwoo can't be used for racing, but dropping chains under peak torque is scary and dangerous, and it's not like my previous bikes (shimano 105 mech & sram red mech) would necessarily perform flawlessly under such conditions either (in fact my sram red FD was always a POS). So, i'm not testing that, and the reality is very few people will really have good intel on that.

Bottom line: if there's a signficant price gap vs shimano / sram, and if you're going to be kind to the kit (it's absolutely a SKILL to know how to shift for best shifting performance, whether you're on LTWOO or shimano/sram), ltwoo probably makes sense.
If not, then you have to think a bit harder as the answer becomes less clear.

And i guess, let's mention weather proofing and niche uses like ultra distance racing, bike packing, and that sort of things. If you're going to do exotic stuff like commute in the rain every day or spend 3 weeks in the Atlas mountains with a sleeping bag, then you're probably risk adverse enough to consider bomb proof setups, and not this.


cassette / chainring: you can use anything. from experience, 11s seems to shift better than 12s, which makes sense: same width, narrower cogs, more accuracy needed on 12 than 11 to shift well. I recommend 11s on these groups. If you're on 2x, 12s is a bit of a gimmick to sell new bikes. 11s has cheaper parts and is more dependable, easier to calibrate.
Do expect to spend a significant amount of time over several rides to really dial in the shifting. And if you knock the derailleurs, or drop a chain or something like that, expect to re-calibrate stuff. It's not plug and play.
To be fair, a friend bought an sworks SL7 with ultegra di2 (might be DA, even), i think he fixed a puncture, knocked the derailleur, and hasn't re-calibrated his gears properly either, so his bike makes clicking noises. So his experience is that di2 is not plug and play either.

Last piece of rant: in europe, the battery for di2, which is a plastic sleeve with 2 batteries in it, just that, on sale, is over 150 eur. Shimano, from the bottom of my heart, go fuck yourself.
Fast on the flat. And nowhere else.

BeR

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1435 on: March 08, 2025, 07:22:09 AM »
Well... Death and taxes... Fairness / level playing field... It's not lame. I can't say I like it, but it's something you can order from the toilet to your door in one click. It's competing against bike shops and legit online retailers, subject to VAT, taxes, customer friendly return terms, warranty and so on. I'm all in favour of cutting out middlemen that add little to no value. However, if you start cheating taxes, it's not fair anymore.
The concept of tariffs isn't crazy either. Unfortunately we know that public money is mostly spent poorly, but in spirit, i support the idea of being taxed a little bit on such purchases so that the money goes towards something useful. Idk if it's creating a bit of industry, bike paths, bike events, bike handling / maintenance classes, but in the spirit of fairness, we shouldn't be able to buy shit abroad and pay no VAT / taxes when businesses around us are subject to both taxes and VAT.
Now obviously if there was the option not to pay VAT, i'd pick it, but the idea remains :)


We've broken 4 or 5 ER9 RDs, i stopped counting honestly. But we got early versions. I think the consensus is that when it's working (ie not broken) and well calibrated, it's great.
Caveats: price and relative value. The new ERX on panda podium is 650$, for eg. At this price point, compared to 105 di2, for eg, well... The idea is that i recommend ltwoo if and only if the relative value is a no brainer. And that's a function of jurisdiction, time and so on.
Racing performance: i don't race, and i avoid shifting in shitty situations. So I'm not changing 3 cogs, switching to the big ring, out of the saddle, uphill, suddenly, and panicked. aka, the sort of thing that you do when you race. It's important to flag, because i heard very recent horror stories of pros racing ltwoo er9/erx groups and getting dropped chains, mechanical failures and the likes. I am not saying that ltwoo can't be used for racing, but dropping chains under peak torque is scary and dangerous, and it's not like my previous bikes (shimano 105 mech & sram red mech) would necessarily perform flawlessly under such conditions either (in fact my sram red FD was always a POS). So, i'm not testing that, and the reality is very few people will really have good intel on that.

Bottom line: if there's a signficant price gap vs shimano / sram, and if you're going to be kind to the kit (it's absolutely a SKILL to know how to shift for best shifting performance, whether you're on LTWOO or shimano/sram), ltwoo probably makes sense.
If not, then you have to think a bit harder as the answer becomes less clear.

And i guess, let's mention weather proofing and niche uses like ultra distance racing, bike packing, and that sort of things. If you're going to do exotic stuff like commute in the rain every day or spend 3 weeks in the Atlas mountains with a sleeping bag, then you're probably risk adverse enough to consider bomb proof setups, and not this.


cassette / chainring: you can use anything. from experience, 11s seems to shift better than 12s, which makes sense: same width, narrower cogs, more accuracy needed on 12 than 11 to shift well. I recommend 11s on these groups. If you're on 2x, 12s is a bit of a gimmick to sell new bikes. 11s has cheaper parts and is more dependable, easier to calibrate.
Do expect to spend a significant amount of time over several rides to really dial in the shifting. And if you knock the derailleurs, or drop a chain or something like that, expect to re-calibrate stuff. It's not plug and play.
To be fair, a friend bought an sworks SL7 with ultegra di2 (might be DA, even), i think he fixed a puncture, knocked the derailleur, and hasn't re-calibrated his gears properly either, so his bike makes clicking noises. So his experience is that di2 is not plug and play either.

Last piece of rant: in europe, the battery for di2, which is a plastic sleeve with 2 batteries in it, just that, on sale, is over 150 eur. Shimano, from the bottom of my heart, go fuck yourself.

Indeed, what is lame is not the VAT but the fact that the amount of VAT changes a lot in the european countries. More than 100 euros between France and Belgium for example on a 900 € item.

Thanks for the explanation about the groupset.

Avalius

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1436 on: March 08, 2025, 05:17:18 PM »
Would you mind checking if you can order now? go all the way to "pay" page, then ofc dont press pay. what happens is that at the last page, i get a >150 eur error related message. afaik, the issue wasnt there a few weeks ago.

Checked, can order from 80 designer store. Ltwoo official never worked here.
Belgium also adjusts price and than it's import duties.
"You can't be sad while riding a bicycle."

Alastair_S1D

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1437 on: March 10, 2025, 02:48:22 AM »
Well I've now put about 7 hours on my gen  3 eRX on its current charge with the XTAR 1200 batteries. So far the app still reports 90% capacity after those 7 hours and I have had no mid-ride shutdowns so far.

I think my charger wasn't up to the task. They only gave me a cable in the box so I ended up using an old cellphone charger. After closer inspection said charger was only rated at 5v 2A.

So I went and bought a charger that could do 10v since both those cells in series charged is around 8.4v. And so far I think everything is good?

enjoying my eRX gen 3 tremendously. But as a recent convert over from the mechanical side of things I wonder if alot of ex mechanical users feel the way I do. I miss the clicks and clunks of mechanical shifting. I would describe it to a car enthusiast / petrol head as the same sort of feeling of going from a fully manual transmission to a semi-automatic paddle shift. Yes TECHNICALLY you are still driving it in a manual capacity but it's not the same. I feel electric shifting removes some of the character and some of the soul of the bike.

But I had no choice really since my bike is designed specifically for electric. I managed to make mechanical cables fit into the frame but it was a nightmare. And after 10K kms it was time to replace cables, the thought terrifies me so I chickened and got eRX.

It shifts amazingly quick compared to mechanical. I don't know how it compares to other electric options. But for a mechanical guy this is fast. And once you've fine tuned in the app it's perfect everytime. No missed shifts because you didn't throw the lever far enough to catch the next tooth in the shifter or anything like that just perfect. Sometimes I have to look to confirmed I have actually shifted because it's so smooth and precise I haven't felt the actual shift occur.

In other words. I love it. It's great. I do miss the character of a mechanical drive. But other than that this is awesome!
Brakes are good too.

End of my little review


Now on the gen 3 shifters. Anyone notice they get quite rattley? I get a lot of rattle from the buttons I think. Any one got any home hacks or remedy for that?

amacal1

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1438 on: March 11, 2025, 09:22:21 AM »

 I do miss the character of a mechanical drive. But other than that this is awesome!


Cassette tapes had "character" too, that little warble-y sound they would do with high frequencies and other such artifacts. Though it was funny to listen to my old Journey mix tape while Steve Perry belted over some high pitched synth, I absolutely don't "miss" that being the only way to listen to music in my car. And, though my mechanical Ultegra is very good, electric shifting is just better 99 times out of 100. And, probably better that last time, too, but occasionally a big mechanical "clunk" followed by a perfect shift is fun, so 1/100 ain't bad!

jonathanf2

Re: LTWOO ER9 & ERX - Electronic groepsets
« Reply #1439 on: March 11, 2025, 09:44:48 AM »
I was just riding my eGR gravel bike yesterday thinking how much better the shift buttons are versus the ver 1 eR9 shifters and how much more responsive the newer brake calipers are! I can just imagine the new ver 3 eR9/X is that much better in overall performance! Though is enough to justify a new purchase?  ::) ;D