I was wanting to do 18" front and 17" rear, but couldn't find a reputable wide street tire in 17", and I don't want to run DR all the time. My only caution on going smaller than 18" out back.
Wow , really? How wide were you looking to go? I was thinking 275/40/17 but that is a mostly drag tire size. I guess 'reputable' is the key variance there, lol. What do you consider to be a decent none drag tire?
Are you aware of any 17s that will fit a 335i BBK? IIRC even some 18s will not. Spacers may help in some situations.
Oh absolutely not. Even my buddy's M3 18s were hitting the caliper with the inside edge wheel weight. That's why I figured I'd have to go 'reverse staggered' but that makes it even more difficult in finding a set of wheels. I think Apex ARC8s are the ONLY wheel to come in BMW fitment in an 18 and a proper wide 17. At least, that's all I've found that looks decent.