I'm thinking of getting a 4th gen posi 3.73 dics brake rear end.

I am wondering what is the smallest rim size that fits on there? I have the 15" rims right now. Am I going to need to go larger in order to fit them on the 4th gen rear, or do you think the 15s will work?

Has anyone else had this problem?

15s will fit, clearance won't be an issue. But they look a little goofy because they will stick out, even more so if you have dinky little tires on the back (like 215/65R15s) If you have fat tires it won't be so bad.

I'm just woried about this for the time being. I'll worry about the width as soon as I get the rear on the car. Thanks for the help.