I don’t have an angle grinder, but I do have a tiny hand file! I filed down that spot, put the wheel on, and it was rubbing in a different spot. Ground more off, wheel rubbed more. This cycle repeated about 19 times until I gave up and ordered spacers. The wheels fit with the spacers but discount tire won’t touch anything with floating spacers so I’m stuck until the rear calipers and rotors I re-ordered arrive. I’m a little relieved though that I won’t have to rely on the spacers, the lack of lug thread engagement was a little scary.