Are you saying there's no press on the new rotors or the old ones? Either way, no there's reallyno need for a press fit there. The rotors center on the hubs, nit the studs, so you're good there. When the wheel is tightened down, you've got a rotor sammich. They ain't goin anywhere. The only real reason Chrysler swedged rotors and drums on was to keep them in place goin down the assembly line. There really was no other reason for it.