So I decided to pull the trigger on new rims and tires for my 12 gt track pack. So I ordered two 305/30r19 for the 10" rear rims and just swapped the old fronts onto the new rims. I know it's retarded but I didn't think of the sidewall height issue. My fronts are 40 sidewall and rear is 30. Is this causing my soft handling and weak turn in? I am ordering fronts and don't know if I should get 30 sidewall or 35. I hope somebody can tell me that it's just the sidewall difference that makes it handle like crap.