I assume the 10mm would be better for a heavier bike, like.........mine? I have no problem lifting my bike by an 8mm bolt at all but at the same time, you have to keep in mind that I am going to have to drill and tap the swingarm to be able to use these.

I thought about have a machine shop near where I work to weld a small bung under the arm to allow me to bolt the spools on but I simply don't want anyone welding my shit besides me and I am not setup to do aluminum.