This is the best I could find...
http://www.alloywheelsdirect.net/bmw...264_wheel_1036
Front alloy wheels: 18x7.5" ET49
Wheel part number: BMW 36116779800
Rear alloy wheels: 18x8.5" ET52
Wheel part number: BMW 36116779803
Plus stock tire size and rim weight from Dackel's link
Bereifung kg
215/40R18 11,00
245/35R18 11,92
no other measurements tho. sorry bro