Replacement Wheel Stud - Front Problem

that's because your front hubs are swedged (SP) to the drum-- a special tool is needed to remove this before replacing/driving out the stud-- that is why the same size wheel stud will not work when the old one is driven out--- the swedge was not removed so a larger diameter was forced out the knurled area. Lawrence

Your right on about the tool. I used to have both, 7/16 & 1/2. I think I still have one of them. One of them got loaned & never returned. They just chuck up in a drill, position it over the stud & cut away the swedge. Slicker than snott. Not too many people remeber this cutting tool.
I found out the hard way, by ruining a drum & hub.