Slop in rear rotors on hubs?

[Kbl7td]

Anyone experience slop in the rear rotors regarding the stud holes? The router is snug on the center portion of the hub, however it isn’t snug on holes for the studs. I can rotate it between say the 12’ and 12:05 position. The front rotor doesn’t experience the same issue. On the front the studs have a shoulder that protrudes out more and fits securely within the holes of the rotors.

I’ve never seen this on any vehicles I’ve had. I’m assuming it has to do with the studs that were swapped from the original metric studs.

[Kbl7td]

Well once again I answer my own questions with different google terms. Here’s a thread from awhile ago on another forum.

https://www.ffcars.com/threads/rotor-slop.642487/

Additionally searching “rotor slop studs” on google yields similar results.

Still, I find it interesting that this is only present in the rear where the studs were replaced. I’d love to know if this condition is present on the pre swapped studs that were original to the 2015 mustang.

[Windsor]

FWIW, I see similar slop on Toyota hubs.

Once the tires are bolted up, it isn't moving.