Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

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iamalex

Rotor chainset + 50/34 Praxis rings + 6870 DI2 + Ultegra chain

Front upshifts very temperamental, chain doesn't catch the big ring and slips around. Have to shift with minimal load. I've tried to setup from scratch a couple of time now.

Chainrings had 2000km on a 10speed setup before going to 11speed. Total 10000km. Could be that?

Any obvious setup steps to resolve?

Thanks

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hippy in reply to @iamalex

I have that combo with cheaper chain and it's generally fine.

Had an issue few weeks back where the bike was CAKED in mud and shite and did a double shift after corner before a climb. It didn't shift quick enough and I thought I'd thrown the chain or something but it hadn't just sounded dodgy.

Have you followed the proper steps for adjusting the Di2 FD? They're not like cable FDs

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dancing james in reply to @hippy

yep, followed all the videos online, and it always shifts perfectly on the stand, but is then v slow - often 2 whole cycles of the cranks needed with finger on the shifter for the chain to jump when pedalling v softly

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