LTWOO ER9 & ERX - Electronic groepsets

[boxof13]

So I went and impulse bought some Zrace XG calipers for my Ltwoo ER9 groupset. Was wondering since the pistons are both 22mm but the Ltwoo ones are ceramic and Zrace is aluminum... has anyone here swapped them to see if they're interchangeable? Lol

Yes, they use the same piston i.e. 22mm. In fact, I replaced my first two Zrace XG pistons with ceramics ones I bought from AE. Unfortunately, one of the two XGs I had started leaking from around the piston. I don't have much time to tinker around, so I replaced that with a new updated XG, which I bought for $22 using discount and coins. By the way, the new XG calipers comes with what looks to be ceramic piston. They are no longer Aluminum. Overall, I think the new updated XG calipers are much improved. This includes longer portion where we thread in the olive, supposedly to avoid having the channel blocked by olives or the hose. This was highlighted in TraceVelo video. Will give XG another chance before moving back to Shimano. Trying for a werightweenie build, so >50gr saving is tempting. Also, for the kind of riding I do, XG is plenty powerful already and have worked well for the past ~7000km for me.

[Takiyaki]

So I went and impulse bought some Zrace XG calipers for my Ltwoo ER9 groupset. Was wondering since the pistons are both 22mm but the Ltwoo ones are ceramic and Zrace is aluminum... has anyone here swapped them to see if they're interchangeable? Lol

I just got a set for my first hydro build... would not recommend. Got a pair, one seems to have a sticky piston. Dont wanna bother with rebuilding or w/e, I just ordered Ultegra.

[elmtree]

There's no way to switch which button is up and which is down on a given side, right? When sprinting I'm struggling to hit the rear button on the right to get a harder gear.

[mrpercussive]

There's no way to switch which button is up and which is down on a given side, right? When sprinting I'm struggling to hit the rear button on the right to get a harder gear.

AFAIK there isnt except for the front derailleur where you cans wap it to be a single button shift

[jonathanf2]

You can adjust lever position to move it closer to the drops. Especially if you can't reach the buttons.

[Sebastian]

I wish the buttons were customisable. Being able to do that is kind of the point of going electronic. I wonder why they’re not. Patent reasons or did LTWOO just not bother. I’d love to set the shift buttons up Sram style.

[elmtree]

The issue is I can too easily reach the further shift button so when I'm sprinting my finger rests on the shift button for going easier. Not ideal haha

Maybe I'll shoot them an email about configurable buttons

[jonathanf2]

Finally happened. My 2nd ER9 RD died on me during a ride. My 1st ER9 groupset is working great, but this 2nd one just stopped. FD works fine, shifters seem to be working and battery holder/cables haven't been compromised. Plus I don't ride in the rain, so it's definitely a bad RD and not a water ingress issue. I just contacted the 80 Design Store to see if I can get a replacement unit. Hopefully they live up to their customer service reputation!

[boxof13]

Finally happened. My 2nd ER9 RD died on me during a ride. My 1st ER9 groupset is working great, but this 2nd one just stopped. FD works fine, shifters seem to be working and battery holder/cables haven't been compromised. Plus I don't ride in the rain, so it's definitely a bad RD and not a water ingress issue. I just contacted the 80 Design Store to see if I can get a replacement unit. Hopefully they live up to their customer service reputation!

Ouch! Hopefully 80 Design Store will sort you out quickly!
Just wondering, you mentioned that FD is still fine. Does it still shift with dead RD? Could it be that RD is somehow stuck mechanically? I remember seeing TraceVelo had this issue on his eGR, I think!?

[jonathanf2]

Ouch! Hopefully 80 Design Store will sort you out quickly!
Just wondering, you mentioned that FD is still fine. Does it still shift with dead RD? Could it be that RD is somehow stuck mechanically? I remember seeing TraceVelo had this issue on his eGR, I think!?

It doesn't seem like a mechanical issue. Whenever I try to upshift, it just flashes a red light. The FD shifts fine. I tried several hard resets, swapped batteries and switched the plugs around. My other ER9 bike is running like a champ. Thankfully I have several bikes in case one goes down!

[elmtree]

Flashing the red light means it thinks it's at the end of its travel when it's working. Could it be that the end stop is being depressed because some stuff slipped?

[Serge_K]

It doesn't seem like a mechanical issue. Whenever I try to upshift, it just flashes a red light. The FD shifts fine. I tried several hard resets, swapped batteries and switched the plugs around. My other ER9 bike is running like a champ. Thankfully I have several bikes in case one goes down!

hihihi, welcome to the club. I wish i had good news.
My 3 dead RDs would make a weird noise and refuse to upshift, and i was never offered solutions. I managed to get 2 warranty replaced, and not the 3rd one, at which point i gave up and made plans to buy them new. One of my friends bought a spare RD for 150 eur on AliX as insurance policy, so he can keep riding if his RD dies. His and mine are the only that havent died from the batch of 5 we ordered last year.
I'm still riding with mine, i've put almost 9k km on it. The charging port is half broken because it's a bad design (worst case i charge the batteries in a dedicated lithium charger which i already have), but other than that, the group works super well, so assuming i can source groups at a good price (c.400 usd for shifters & FD/RD + brakes), then what i plan to do is order than AND a spare RD, because in the west, 150 EUR is basically a visit to the bike shop, so it's a good insurance policy.
That logic quickly breaks down if the price of the group goes up.

[jonathanf2]

Flashing the red light means it thinks it's at the end of its travel when it's working. Could it be that the end stop is being depressed because some stuff slipped?

It's pretty much stuck now at the lowest gear. It just won't shift. I might tinker with it some more to see if I can get it to wake up, but it just makes a click sound, but nothing is happening.

hihihi, welcome to the club. I wish i had good news.
My 3 dead RDs would make a weird noise and refuse to upshift, and i was never offered solutions. I managed to get 2 warranty replaced, and not the 3rd one, at which point i gave up and made plans to buy them new. One of my friends bought a spare RD for 150 eur on AliX as insurance policy, so he can keep riding if his RD dies. His and mine are the only that havent died from the batch of 5 we ordered last year.
I'm still riding with mine, i've put almost 9k km on it. The charging port is half broken because it's a bad design (worst case i charge the batteries in a dedicated lithium charger which i already have), but other than that, the group works super well, so assuming i can source groups at a good price (c.400 usd for shifters & FD/RD + brakes), then what i plan to do is order than AND a spare RD, because in the west, 150 EUR is basically a visit to the bike shop, so it's a good insurance policy.
That logic quickly breaks down if the price of the group goes up.

The 80 Design Store messaged me. Unfortunately (for me), it's National Day in China and it's a week long holiday starting Oct 1st. They'll get back to me next week. As long as I can get a warranty replacement, I'll be fine.

[mrpercussive]

It's pretty much stuck now at the lowest gear. It just won't shift. I might tinker with it some more to see if I can get it to wake up, but it just makes a click sound, but nothing is happening.

The 80 Design Store messaged me. Unfortunately (for me), it's National Day in China and it's a week long holiday starting Oct 1st. They'll get back to me next week. As long as I can get a warranty replacement, I'll be fine.

Could it be the shifter button getting stuck? Like I had an issue where the spring wasn't strong enough to push the buttons back out. It was like two Phillips screws, take the buttons out, stretch out the springs and put them back together and my problems were solved

[mrpercussive]

So I went and impulse bought some Zrace XG calipers for my Ltwoo ER9 groupset. Was wondering since the pistons are both 22mm but the Ltwoo ones are ceramic and Zrace is aluminum... has anyone here swapped them to see if they're interchangeable? Lol

Got the Zrace calipers in and put them on. I think this is like a 3rd gen? Unlike Tracevelo who has two separate ports where the hose goes into and Fiveminutevelo where the there is one main port and one half port for the second piston... Mine only has one port so they've machined it differently and now the fluid gets distributed to both pistons after the ONE port from the hose. Pistons are still the same black alloy ones. I haven't had a chance to bed in the pads and ride them yet so we'll see but initial impressions is that they are feel better than the stock Ltwoo calipers with the lever feel. Overall looks to be pretty well made and really looking forward to giving this a go!