I have a 06 blob sti, which needs new tyres, the car is fitted prodrive pff7's, does anybody know the standard tyre size for this alloy?

The previous owner was a cheapskate, so I cant trust the tyre size on the alloys at present.

Also, is it ok to use a 235/40/18 tyre to protect the alloys?

 

Standard size is 225/40/18

I have PFF7's with 235/40/18 on my 05 STI and they fit fine - also think the Spec C had 235/40/18

 

Thanks for that, turns out the tyres I was looking at dont come in a 235/40.