Originally Posted by 1QuikWS6
You'll be fine - that's what I have run on my 328iX E92 for years with no problems. XDrive between E90/E92 is same - one not more sensitive then the other...
Tire sizes = 25.09" Dia Fronts/25.03" Dia Rears
For the longest time those were the reccomended tire sizes for use with 8-8.5 Front wheels/9-9.5 Rear Wheels according to TireRack & many others.
In recent history people have been pushing it and using larger sizes - in the end, it's the OD of the tire/wheel combo between Front/Rear that need to be <1% difference
are you using 8.5 or 9.5 in the rear on the wheel size?