Cheat Sheet: 10-speed and 11-speed crash mode

Updated May 4, 2025by BetterShifting Terry1 min read

To reset crash mode on 10-speed (6770) and 11-speed Di2 (6870, 9070, R8050, R9150, GRX), you press and hold the button on your junction box for 5 seconds until a red light flashes.

The rear derailleur will now reset and go through all the gears, so make sure sure you spin the cranks until it’s done.

Once it has gone through all the gears you’re done and ready to get back to enjoying your ride.

BetterShifting Terry

About the Author - BetterShifting Terry

I enjoy playing with bike tech - both bike building and wheel building, bike maintenance and of course, Di2. Besides writing content and working on the technical side of BetterShifting, I also work as a Software Developer in The Netherlands. Read more on the About this site page.

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