I broke my 1/2 studs years ago and they were only a year or so old, I have Mark Williams Axles I sent them to them they installed 5/8 studs and reheat treated the axles it wasn't much at all a couple hundred maybe , I haven't had a problem since. I had the Holeshot wheels custom made for my application last year and one of the options was having the stud holes made for 5/8 studs which I had done.