So I have read alot of these posts and I am gonna go with Motegi Tracklite but is 245/40 the right tire size. To tell the truth I have the hardest time with tire sizes. I really dont want any rub.

 

if your going to run that 17x8 in your sig, then yes, that is the perfect tire size. thats what im going to run on my 17x8. i did the calculations and 245/40 is the closest you can get to stock tire diameter, but your contact patch is 30mm wider!