I ran a 275/60 15 BF Goodrich radial TA on a 7" rim on my ElCamino for a summer and a half with out issue. the 7" rim pulled the tire in just enough so that I didn't have issues with it rubbing on the quarter. I use an 8" rim with my drag radials with the same backspacing and they will rub the quarter occasionally. My car is dropped in the back, so it may not be an issue if you have stock springs. The 7" rim makes the tire look fatter. You can see the 275 on a 7" wheel on my car in the visitor's cars section. It is the blue ElCamino on the firts page under Travis Brown. I don't know if the malibu's have more clearance, but I imagine that they would be pretty close