:URGENT!: stock bolt type and size

[iJagadavigada]

hi! i'm planning to get spacers for my 2007 328i sedan. I am wondering what the stock length of bolt this cars take? and also if it's using conical or ball head.
tnX hoping to get answer soon as

[fun2drive]

Look here
http://bmwfans.info/parts/catalog/E90/Sedan/USA/328i-N52N/LHD/N/2007/browse/wheels/bmw_light_alloy_wheel_radial_spoke_32/

Use this link to answer questions like this.
M12 X 15 is the answer and they are all tapered, you can space back and see all the wheels that fit that model car but they should all be the same.

Hope that helps...