For those of you that run 245 and 275 in the back on 19" rims does it rub in anyway if the car isnt lowered?

 

Doesn't rub at all... not even close - I have 19.9.5 front, and 19x10.5 rears and it's fine.

 

Thanks...Any suggesting as to which rim I should go with?

 

anyone put 245/275 combo mentioned above on 19s on a car with Rear Active Steer? Any issues?

 

the diameter of the rim plays a minimal factor in whether the tire will or won't rub. It's the width of the rim and the offset that will have the largest determining factor. Additionally, those w/ 275-35-19s may experience somewhat more rubbing that those running 275-30-19.

You cannot just worry about tire width and rim diameter w/o considering all the other parameters. a 205 width tire on 15" rims would rub on your car if the offset and width were wrong.