It is all kind of confusing at times, lol. I found a wheel backspacing calculator on rimsntires that helps a lot. Waiting on my 20 mm spacers and longer bolts to come in so that I can install my new wheels. I tried the front on already and its crazy how much difference a little bit of tire sidewall and an inch of rim makes to ride, lol. I went to a 19 front with 235 35 19 tire. A little more harsh but feels very much one with the road now. Good luck. Plenty of guys here to help you figure it out once you have all of the information.