I got a 09 cobalt 2lt with drums in back and disc up front i was wondering what offset range woul work im been looking at some with 40-42mm offset. I just want to know the range of offset that will work with my car.

 

pretty sure the range is 35 to 45

 

Try and stay between +38 and +42 if you can. +35 may cause tire rubbing issues (depending on tire size) and +45 will be pretty deep in the wheel wells.