>>1015075I don't own a torque wrench nor know what the torque rating is for the axle nuts. I actually did the nuts up so tight once that I completely stripped the threads in them (they're pretty soft, much softer than the axle) and had to buy some replacements. Unfortunately it's not a standard 10mm axle threading so getting some harder replacements isn't that simple (they could be found of course, but I could never find the spec and I don't have the equipment to identify the thread myself).
Torque arms are bars that rigidly attach the axle to the frame, like you see on coaster brake hubs and that one you posted, and stop the axle from rotating. As standard the Alfines rely on washers that slide over the axle (it's not completely round) and slot into the dropouts. They're the yellow part in this photo.
