The cranks don't last long once they start coming apart and they're only replacing the ones that are already coming apart so it will actually be not that many.
I can only assume this statement is to limit the numbers sent to them?
If they get sent a set don’t replace them and they then subsequently fail, aren’t Shimano in a worse position?
The cranks don't last long once they start coming apart and they're only replacing the ones that are already coming apart so it will actually be not that many.