Sequencetial Shift
Adding the option to select the gears yourself when the derailleur and rear derailleur shift when sequential shifting, as is possible with Shimano with the DI2.
e.g. not at penultimate gear but earlier at third gear.
10/28
not from 24 to 19 but from 21 to 17.
The slant of the chain is otherwise so large
40
votes

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HarryG commented
And it might also help to prevent chain drops, thanks