That is correct.
So in all fair honesty John,your car will be fine with 215/45/17 on your 7.5inch wide STI wheels.
It just might be a very little strech on your tyres but it will be grand.
Jst be carefull with the new tyres tho...you will need to get use to them first.
P.S....JDM STI came with 235/45/17 on the SAME wheels....how comfusing!