How do you measure offset?

[PDX///M]

I am selling a set of 17x8 Forgeline LS rims and a guy with a 1994 mercedes c280. I had my rims on my 95 M3 but I dont know if they will fit his car.

How do I measure the rims?

[r6e36]

Usually the offset # is stamped on the inside of the wheels.
It's kind of hard to measure the offset of a wheel accurately. Basically you have to find the center of the wheel and then measure how far out the inside mounting point is. that distance in mm is the offset.

[jayhudson]

Kevin-

Offset is the distance between the mounting surface of the wheel and the centerline of the wheel. Check this out

http://www.tirerack.com/wheels/tech/offset.htm

Jay