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I gotta check mine.
I have two bikes which have 10-speed groups on them.
But I installed 11-speed cranks on both of them.. some kind of future proof logic, but 6-7 years later I haven't need to replace any of the derailleurs so they've never been fully switched to 11-speed groups.
The one bike that is most likely to be effected I'd almost be tempted to switch it to eTap. The mechanical shimano stuff on it is perfect... but if I end up having to buy a new crank I might just be done with Shimano on that bike.
I have had a case where my chainring skipped and my foot crashed to the bottom of the pedal stroke while I was standing. That was scary enough and it was amazing I didn't crash. The idea of taking it a step further and the pedal brakes off is scary enough that if I'm effected but my crank isn't broken so they say "just wait and see" I would just replace it.
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