I'm running the 41mm offset RPF1s with 205 Toyos on a CRX. The inverted Penskes I run cause clearance problems with the rear bar, but not with the tires. I don't see a problem running 225s with these wheels, but I've never tried it. I'm not developing enough tire temp to justify the increase in width. I've read they are up to a second faster on some tracks, but I guess I'm not driving hard enough
Martin