[canadmos]

Let's ask @Toshi how his crushed di2 cable performed afterwards.

I too carry a spare steel cable in my pack on rides. Have not snapped a cable in years, but hey at least it's there.

 

[Toshi]

Do you carry e-tube spares and a laptop on your rides? I do carry a spare shifter cable when I know I'll be away from civilization for a while. All I need to change it is a couple Allen keys. That doesn't apply to e-tubes.

On the other hand, when my Di2 cable died a grinding death the fallback behavior was for the derailleur to remain in its current gear. Unless a reverse sprung XTR derailleur of olde then most conventional derailleurs would snap right to the smallest cog, afaik.

 

[w00dy]

Skip to 22 mins for the interesting bit.

 

[HardtailHack]

That Boxer bit set looks pretty tidy.