[Vader]

I have about 12,000 miles on my tires and my rears are starting to get a bit bare. I currently have the stock 255/45ZR in the rear with the 245's up front.

My question is this: What's the fattest I can go without the tires sticking out at all or needing to modify the wheel wells? I've always loved the look of the fat tires (seeing them on Lambo's/Vipers, etc) and I definitely wouldn't mind hooking up better, especially with my rwhp and torque. Also, would have have to go with a bigger tire upfront right away or could I roll with the 245's until they wear done and need to be replaced?

Thanks in advance for your replies! Cheers!