LTWOO ER9 & ERX - Electronic groepsets

[mrpercussive]

Anyone was sucsesfull connecting the shifters to Garmin computer or watch to see the used gear?

Got mine to connect to my igs630. It takes a while for the computer to register shifts but it does it. It also shows the battery in the seatpost.

https://youtu.be/-UaqkXsHpyk?si=kU6klY6GOLyTtyO3&t=870

[Sebastian]

I upgraded my er9 equipped bike from 11 to 12sp. I switched the groupset to 12sp in the firmware, calibrated the RD and adjusted the individual gears. But there's an issue now: Every time I shift the RD to the biggest cog on the cassette, it stays there only for a second or so and then shifts back down to the second biggest cog. I dunno why. Has anyone else had that issue?

It does that regardless of whether i control the RD with the app or with the shift buttons and regardless of whether I'm in the small or big ring up front. It almost looks like some sort of safety feature. I'm using an 11-34 cassette now. But the gears are running smooth, the RD cage is not overstretched. The upper pulley isn't touching the cassette. Obviously the big/big combination is noisier, but there's no inherent problem. No idea what's going on. I might try to restore the factory settings and see if that helps.

[toxin]

Have you indexed it far enough inboard? The rear derraileur overshifts slightly then adjusts back in-line with the cog. Likely their way of improving compatibility with random third-party.

[Sebastian]

Have you indexed it far enough inboard? The rear derraileur overshifts slightly then adjusts back in-line with the cog. Likely their way of improving compatibility with random third-party.

Interesting. It seems that the b screw adjustment was the issue. I did a factory reset. The problem persisted. I adjusted the upper pulley slightly further away from the cassette. Then the gear stayed in place when on the small ring up front. But the rd shifted back automatically when on the big ring. Likely because in the big big combo the rd pulley sits closer to the cassette and there’s more vibration. So I adjusted the b screw again setting the pulley even further from the cassette. Now it’s fine. It seems there is some sort of protective feature or a variation of crash mode? The excessive vibrations seem to cause it to avoid that gear.

[Sebastian]

Can you make a video showing what you did?

Not really worth a vid, IMO. I pulled the plug, applied silicone grease in the slot where the plug sits and put it back in. It takes literally less than a minute. I washed the bike thoroughly yesterday and did spray water onto the RD and the plug deliberately. No issues. You could probably even use silicone sealant for a more permanent solution. The flakes everywhere on the pic are just little pieces of wax from the chain.

[Pedaldancer]

Not really worth a vid, IMO. I pulled the plug, applied silicone grease in the slot where the plug sits and put it back in. It takes literally less than a minute. I washed the bike thoroughly yesterday and did spray water onto the RD and the plug deliberately. No issues. You could probably even use silicone sealant for a more permanent solution. The flakes everywhere on the pic are just little piecesof wax from the chain.

Good idea! With silicone sealant this would be a stable sealing I guess. If you can manage to have a proper adhesion on the plastic. That's maybe tricky.

[zerstorer]

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

Have you paired it successfully? I have my ER9 on order and plan to use it with my karoo2

[Martijnschiedam]

Hi all,

I’m getting sent rear derailleur number 3 now. First one stopped working all together. Second one started to fail communicating with the shifters having to oish sometimes ten times to get a reaction. Very frustrating because when the Erx group shifts, it shifts nice! Luckily they are truing their utmost to be helpful. I have ordered the mechanical R9 as a backup now.

Fingers crossed. 

Martijn

[Sebastian]

Have you paired it successfully? I have my ER9 on order and plan to use it with my karoo2

I paired it successfully with my Wahoo Roam v.1
Sometimes it's a bit slow to display the gear changes but other than that it's fine. Pairing worked instantly.

[RDY]

I'm guessing they'll announce a 'final' (not final but works properly) product at SBS next year.  Same I think with WheelTop and Sensah, though Sensah may miss it.

[ernovice]

Thanks to this thread I just ordered myself a sub 400€ er9 groupset! Thank you!
This will replace a mech 105 on my "adventure / endurance bike" which is a Canyon Endurace 7 alloy.
Anybody know what other disc brake pads can be used? I considered keeping my 105 calipers on, but thought why the hell not make it all ltwoo.

[benquick]

Hi, is anyone else having issues with trimming? I adjusted the front derailleur (low and high limits), so it doesn't rub against the chain when it is shifted in one of the extreme positions (1st or 12th cog) in the rear. I am noticing, however, that the position of the front derailleur doesn't change for all intermediate gears even when pressing the shifter button for the second time. It seems to me that there are only three or four intermediate positions at the front that change depending on what gear I am in at the back. This leads to slight rubbing of the chain against the derailleur in some gears (in my case, 5th and 6th cogs are problematic when I am in the large chainring at the front).

Is this a problem with adjusting the derailleur? Maybe there is a magic button in the app that solves this problem? Any other ideas how to fix this? This seems like a purely software problem to me.

[Ostriker]

Did anyone manage to fit an 11-34 and test it out?

Also looking to know pulley wheel dimensions and how many teeth... would change those to a purple if mine would fit

[benquick]

Did anyone manage to fit an 11-34 and test it out?

Also looking to know pulley wheel dimensions and how many teeth... would change those to a purple if mine would fit

Yes, I have the 11-34 12-speed cassette with a compact chainring in the front and it works great. I think it should be possible to go even bigger.

[Ostriker]

Yes, I have the 11-34 12-speed cassette with a compact chainring in the front and it works great. I think it should be possible to go even bigger.

what cassette are you using? 105?

Thanks