i have 245/50r16 on the back of my camaro. i have 225/50r16 on the front. i like the look of the bigger tires all the way around and swapped the to see if the will fit.... the did but if i turned while hitting a bump they rubbed. i am planning on dropping the car a little and want the bigger tires up front and in the back i wnated 245/50's all the way around so i could rotate them. i drive the car everyday so tire where is pretty good. why cnt i fit these up front and i see some guys with 18 and huge tires under stock suspension.... my car has stock suspension right now. the rims are eagle series 212's 16x8 with nuetral offset

The diameter of the RIM has ZERO to do with if it will fit. Governing factors are overal tire width and ht, and position of the assembly in and out in the wheelwell (backspace)

A 225/30/20 will fit just fine if the backspace is right. A 255/xx/14 probably won't fit in front regardless of backspace. A 245 cross section tire is on the ragged edge of what will fit in an unmodified front wheelwell, but this will depend on the rim backspace and the overall diameter of the tire and ride height.