Do you want to change the wheel nuts on your ZR but still have the OE wheels?
Then you need to have note of this.
The Rover 25/MG ZR use a ball/radial seat type wheel nut, which is unlike the majority of other makes of cars and aftermarket wheels which tend to use a 60 degree Taper/conical...
Car alloy wheel fitment etc, offset, PCD, and tyre size available at this link
Just found this website which tell you what other cars alloys will fit
The link below tells you effectivly how a tyre/wheel size will...