how to find the offset of these rims
http://wheelstudio.com/catalog/product_info.php?products_id=8380&vehicle_make=Mer cedes&vehicle_model=E-Class%20W124%20>%201986-95&t1=225-40r18&t2=&t3=
just from looking at it i assume the offset is 40? or am i wrong? im just looking at all the numbers under the tire name.
thanks


