Originally Posted by
rtciv
Yea I'm not sure why that washer is on there. There are no slots in the dropout to receive the tab on it.
That's a good indication that they came with the wheel then.
Originally Posted by
rtciv
hmm, yes. I assume the washers came with the new electric wheel and perhaps were intended for a fork with the hole/slot for the axle-retaining washer.
See if the center hole of that washer is round or if it's a snug fit against the flats of the axle. If it's a snug fit then that's your anti-rotation device as well. In that case it really needs to hook into the fork somehow to do its job.