91extcab
+1y
the stock rims already fit flush to the axle in the back and the spindles up front. those of us that grind tabs are so we can fit factory wheels from manufacturers other than mazda that use a smaller center bore if we choose not to have the wheels bored out to fit the hubs. if i remember right mazda uses a 3.5" center bore, and gm uses a 3in. or something like that.
the factory studs were long enough for me to use (and i also used the factory nuts) when i had my z71's and never had any problem, and the z71's are by far thicker at the stud than the factory mazda steel wheels or even my current 14's (same thickness at the studs as stock) and still never had a problem with them...