so i have 15" black koing feather rims and i want to go with i bigger size of rims, so what are the sizes i would be lookin for. i now in time ill be getting the sport line drop so try to help me on what rims i could get and the size. right now my lugs are 4 lug pattern so ya. i relly dont now how to measure the rims. but i have 07 cchevy cobalt ls 2 door.