This is purely for appearance to widen up the stance a bit in the rear in conjunction with how wide the rear tailgate and bumper is. This will have 0 affect on what you are saying. The actual variance in size difference is .3% which is almost nothing. The width size difference between the 2 sized is literally around 1.1" total. The heights and rotation are almost identical. The awd drivetrain has plenty of forgiveness with this for the fact of having to run spare tires, Loss of air ect. I run staggered setups on both my 9 sec Grand National and 9 sec Z06 with a monster difference in size and 0 steer issues. Ive been doing this for a long time, My question is more along the line has anyone had any fitment issues with a 295 in the wheel well before I actually dig into it. This questing can yield a simple response of yes I tried and it worked or no it rubbed, Not a question so much as if it will work in a staggered stance "Which it will". Many manufactures do this on SUV's ect, Mercedes, BMW, Porsche ect... The Macan alone runs a 265/45/20 front and 295/40/20 and works as it should from the factory on a AWD setup, These are production vehicles. So saying it will not is not true.... Now obviously if your front tire is 29" tall and your rear is 30" tall, Now you would have a problem. But if you can keep your rotation mass ect within a 1% "Some say 2%" variance of eachother, Everything should be kosher