I'm new to this forum. I was just wondering if I can put the sport 19" oem rims on my 2011. My car currrntly has 18" oem rims, will this swap affect my driving at all? e.g Bumping, grinding, etc...

19's are an option or come with certain trims of your year Maxima already.
I see no problems.

You won't feel too much difference in ride quality. The 2012+ 19'' (non Enkei) wheels are heavy though @ 30lbs a piece.

No noticeable difference, just know 19" can bend easier when hitting pot holes! But the change in look is worth it!