Power2Max NGEco + Ultegra Di2 front shifting problem

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gello
Posts: 7
Joined: Mon Oct 08, 2018 10:48 am

by gello

Hi guys, can anyone help me with the following issue?

I ordered a Power2Max NGEco Rotor 3D24 powermeter to install on my brand new Ultegra Di2 chainring. There is a proper video from P2M which explains every step very well. The great thing that I get to reuse the same chainrings and I need to only replace the cranks and the spider (which is the powermeter itself) I followed all the instructions, I managed to finish the installation but now I'm facing the following issue:

when shifting from the big chainring to the small one the chain stucks between the two chainrings. After a couple of revolutions by hand it finally jumps to the small chainring. But if I try it on a trainer and add pressure with my legs then it gets stuck.
I tried to make a video, maybe it explains better: https://photos.app.goo.gl/1Nwm2TQUx8vMKYrx8

Do I need to adjust something on the front deraileur to fix this? I tried to measure it but it doesn't seem to have a larger gap between the chainrings than in the original setup.

gello
Posts: 7
Joined: Mon Oct 08, 2018 10:48 am

by gello

Well, you can ignore this topic now. But hoping someone will at least learn from my stupidity, here is the solution:

I simply put the small chainring back inside out. I was so sure that I did everything correctly that I didn't even check this trivial thing. So make sure that in case of Ultegra R8000 chainrings (Dura Ace also) the writings should be on the inside, as it is properly stated in the Shimano technical guide: https://si.shimano.com/pdfs/dm/DM-RAFC001-02-ENG.pdf

by Weenie


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