There were some questions raised about mini bearings, and I found this:
M05 car kit uses 12x 1150 & 6x 850
M05PRO chassis kit uses 8x 1150 4x 1050 6x 850
I think the PRO comes with some bearings included but I am not sure, maybe someone could answer that.
The M03's use a combination as well...
Swift and 2006 BMW Mini have the 1050's in the wheels and the others all have 1150's