LTWOO ER9 & ERX - Electronic groepsets

[Dmgreen13]

Installing brifters tonight, I can't remember where I read that the lines are already filled with mineral oil, maybe I'm crazy and made that up - was that the case for you?

Yes the lines are pre filled with brake oil

[lantz]

Yes the lines are pre filled with brake oil

Nice, appreciate the insight!

[lantz]

Was able to get everything installed - awaiting wheels to get everything positioned, but some notes on challenges I had:

- Obviously, use wrenches. I tried to use pliers because I was missing a 5mm wrench and it just made shit very hard, ended up actually backing the hose out of the olive while half-compressed and had to replace the olive.
- As a second-time hydraulic user - realized that BH90 and BH59 olives are the same, it's the needle that's different - needed to order some anyway, so now I have a full set of both lol.
- Also, even though L-twoo uses shimano-style mineral oilt and not DOT fluid, the caliper actually uses the sram-style, recessed-threaded adapter - so, my shimano bleed kit didn't do the job, had to get a new adapter to fit the caliper.
- Ended up completely draining the l-twoo oil from the rear brake through all of the hubbub, which, whatever.
- Once I actually had everything connected up, it was a fucking cakewalk - *really* love the air release in the brifter, makes topping off so easy.

I didn't introduce any air or lose any substantial fluid on the front brake, so I now have one fully bled and replaced (rear) brake with shimano mineral oil and one completely untouched l-twoo-filled (front) brake. Both feel the same, nice and responsive, smooth pull, clear stoppage at a similar travel and quick return.

Fun experience to learn by; the more I do these, the more I learn how to be tidy with the mineral oil, haha.

[Sebastian]

Sorry if this question has been answered before but the search function didn't help:

So which Shimano brake line standard dies LTWOO use? BH90 or BH59?

And: How exactly does the air screw in the brifter work?

Thanks!

[lantz]

I bought BH59 and BH90 hardware, the BH59 needles are what matched what came with the gruppo.

In regards to the air screw: It's meant to be a "final top off" - kind of an escape valve to run a smidge more oil up and out of the line to be sure there's no air after closing the line off. They have a pretty good video here:

They say explicitly not to mix the fluids - but I also watched the Klein Cycling installation and he fully used Shimano mineral oil (red) to top off the brifters - I bled my entire back line out and replaced with full red, so I'm not intermingling, but I don't think there's actually any harm/risk.

[lantz]

Looks like Luke got to the bottom of his eRX issue.

[nickobec]

Looks like Luke got to the bottom of his eRX issue.

Not really, Luke found his FD issue was caused by his RD not behaving, (ie does not relay message to FD to shift).

Why his RD is not working properly is still a mystery. Does not appear to be water ingress or damage to RD. So Luke's theory is software/firmware issue.

[lantz]

Well, right. I suppose 'got to the bottom of' was a poor choice. We'll see how it holds up.

[Dmgreen13]

Sorry if this question has been answered before but the search function didn't help:

So which Shimano brake line standard dies LTWOO use? BH90 or BH59?

And: How exactly does the air screw in the brifter work?

Thanks!

Ltwoo told me BH59.  I ordered some extra as I thought I'd stuff it up installing the brake lines bit miraculously didn't.

Bleeding the brakes was pretty painless following the LTwoo YouTube videos.

[lantz]

Oi, yeah, you're right - I had it backwards, my bad!

[Dark17]

What chargers you guys use? I know the charging cables are included but I am worried about the power supply or if I just plug it in with phone charger it might die or something...

[lantz]

Has anyone using eRX/er9 paired the system with a Hammerhead Karoo 2? Can't sort out the how of it all, hehe.

[Dmgreen13]

What chargers you guys use? I know the charging cables are included but I am worried about the power supply or if I just plug it in with phone charger it might die or something...

I have just used standard phone charger with USB input.

[Sebastian]

I cannot for the life of me get the RD cable through the chainstay. A cable housing is no problem. But the electronic cable plug is rather long and stiff and it seems there's a bend in the cable entry port at the rear drop out that I just can't get the plug to pass. What's more is that my internal cabling tool is useless for this bc you can't connect it to the electronic cable in any way. So I keep taping it to shift cable housing and try to pull it through from both ends. But no success. It tears off every time.

Any tips?

[TidyDinosaur]

I cannot for the life of me get the RD cable through the chainstay. A cable housing is no problem. But the electronic cable plug is rather long and stiff and it seems there's a bend in the cable entry port at the rear drop out that I just can't get the plug to pass. What's more is that my internal cabling tool is useless for this bc you can't connect it to the electronic cable in any way. So I keep taping it to shift cable housing and try to pull it through from both ends. But no success. It tears off every time.

Any tips?

Shrink wrap the 2 together?