The 10 or 15mm hubcentric spacers with corresponding longer bolts will work just fine. If you decide to use the 15mm spacer I would recommend 225/50-16 to eliminate the possibility of rubbing. 225/55 may rub.

I use the H & R 21mm hubcentric spacers (the bolted on the hub type) on my Porsche and they work great. No vibration at all.

Tommy