2002 chevy cavliear wheels what fits what???.

i've got a 02 cavi dropped like 4'' with sprint springs running 17 tuners now but want bigger and have room for 18's .
whats the biggest whels anyone with a cavi has ran ?? looks like a 19'' might squek in with rubber band tire.
i might air ride so i'm open to cutting it up a bit hell it's been paid for soooooooo

a few Cavi owners are runnin 20's and bags. go to www.jbody.org  youll find a lot of answers