Those are LS430 Wheels, and the door handles are from the LS 430.
As I mentioned in the other post:
"It is clear that Cadillac is using the same look for every vehicle in their lineup...so I took a CTS put it in photoshop, and cut out sections, distorted them and reattached them to the car.
The platform for the STS is the same as the CTS which is why I used the CTS as a base. Extended the overhangs, rounded it out just a little, put on some larger wheels (increased the size of wheel wells too) and there you have it.