Di2 help please

i have D/A Di2, fully charged, software updated.

The problem i have is that when i click the inner shift buttons (paddle) to shift down into an easier gear, the gear close upwards. I think, this might be because i’m clumsy fat fingered… but has anyone experienced this before with sticking shift buttons?..

so frustrating when at the bottom of a hill or come to set of traffic lights i cant see to get into an easier gear.

to make things worse, 've already taken it to the shop, and cant seem to replicate the issue on the bike stand!!!

Does this always happen? Only happen under certain circumstances?

I’ve inadvertently click the wrong shift paddle before, but that rarely happens. If you are hitting the wrong shifter a lot:

  • You could ride around a parking lot or other casual environment and practice clicking the correct shifter
  • Re-program the shifters to make things easier. I re-programmed my shifters so that the two right hand shifters shift the derailleurs to the right, and the two left hand shift to the left. For both, the larger shift paddle controls the rear derailleur, and the smaller front paddle controls the front derailleur. Think of this as making Di2 pseudo shift like eTap :smiley:
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Yes! I do this as well. I use the big paddles for the changes I do most often. Especially helpful in winter with chunky gloves. I don’t know why everyone doesn’t do it!


If you run synchroshift you can set it up so one side shifts up and the other shifts down. I have this on my CX bike (which is 1x, but would also do it on 2x). Hit any part of the lever you like, just make sure you’re using the correct hand.

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I don’t have mine set up for synchroshift, but I have my big paddles controlling the RD and the little paddles controlling FD, so very similar. Harder gears are on the right and easier gears on the left. Having the big paddles doing the RD (bulk of shifting) just makes more sense. Very quick learning curve and then the “standard” way seems like a silly relic of the mechanical days. It also matches up better with the SRAM approach for road, so it’s easier to keep straight if you have bikes with both groups.


If it isn’t fat-fingering, check the cable connections.

I was on a ride last year and my Di2 started behaving erratically, then really slow to shift, then stopped shifting–fortunately in an easier gear because the terrain was hilly (central FL does have hills, including one called Sugarloaf, which is nothing like https://www.trainerroad.com/app/cycling/workouts/248188-sugarloaf). About 30 minutes later, I noticed the RD cable connection was hanging loose. Pushed the connector in and suddenly my gears worked again.

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