At the BMW M car meetup I saw one M3 that had the standard 18" rims. Considering that it's standard on all M3/M4s, these rims rarely see the light of day. Most owners choose the 19" black or grey rims. I personally think the 19" look alot better. Even in person the 18" rims didn't look special. They seem to be made of similar material to that found on standard 328i rims etc. It might be of better build quality and material but it just felt cheap looking considering that it's a rim meant for an M car. I would say the 340i options for rims look alot better than these. I would guess that most people would agree with me on this one considering how sparingly these are used on M3/M4s. The plus side is that these rims don't cost $1200 bucks extra which could be better spent on some other options. The smaller rim is supposed to help with better ride quality but I'm not sure that it would make such a big difference. The M3 is already quite stiff and who buys an M for comfort cruising? Tell me what you think about these rims in the comments below!
As a quick note, please use appropriate language and be respectful in the comments section. Any misuse will result in removal from the comments section.