how do i figure what what ball seat radius my aftermarket wheels have? I know stock W210 MB wheels have R12 radius. appreciate any info, is R12 = 12mm? where do i measure? also, if i used R12 lug bolts on wheels that actually require R14 lugs, am i totally screwed?

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Current cars:
2001 MB E55 AMG
2003 Honda S2000
2000 Honda CRV

Gone but not forgotten:
2004 BMW 325i 5sp sport
1999 BMW 540i sport
1997 MB E420
1995 BMW M3 coupe

http://www.mercedesforum.com/m_43082/tm.htm

i dont know how to measure, but i know your stock bolts for your model year
and rim are 12mm. so, take your bolt and see if they'll fit inside the new rim
with slop at the seat....as well as another 1mm clearance inside the bolt hole.
if so, the rim seat is prob 14mm. rushing to watch the game but if i think of
other tips, i'll post. here is a simplistic diagram. oh, the 14mm ball will be
.98" across whereas the 12mm would be .88". gotta run...

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-- raymond~
47º 34'N 122º 18'W

thanks guys. those pics help out a lot.

__________________
Current cars:
2001 MB E55 AMG
2003 Honda S2000
2000 Honda CRV

Gone but not forgotten:
2004 BMW 325i 5sp sport
1999 BMW 540i sport
1997 MB E420
1995 BMW M3 coupe