This one I actually figured out awhile ago:
- For accessing those 18mm ebike axlenuts on axles with power cables
running out of them, and which often having a bash guard also on the axle: FLARE NUT WRENCH.
Sockets won't work because electrical cable, box ends won't work because same, and the open end of a combo wrench is most often TOO FAT around its jaws to fit inside the bars of the bash guard or in the recess of the dropout. A flare nut wrench has the clearance of a box end, with the ability to allow passage for the cable that an open end would have.
A trick that I'd like to try would be to *make* a flare nut wrench from the box end of a combination wrench by grinding an opening into it. I think it'd have to be one of the older box ends that's just a hex inside though, the newer kinds that are more fully castellated inside for multi-positioning on the nut would probably end up being too structurally weak if you cut a slot in them.
And then this one, imparted to me by another mechanic just last week:
- In an emergency, you can re-size a larger diameter innertube into a
smaller one by tucking the tube inside itself until the desired diameter is reached. This has been dubbed "the foreskin technique" (gross, but appropriate). It's important to leave the tube airless until it has been fit into the tire and the beads are in place. Even though the resulting tube has imbalanced weight from being double-thick where it overlaps itself, once inflated it works well enough that you might not even know the difference riding it.
~cyclista Nicholas