Wheel Offset Calculator v2.0
Another simple calculator for figuring out the offset of a rim when you change the size of it. The measurements are usually pretty easy with the rim off the car, and it is always best to start with these numbers as guidelines. Since I'm not an artist, images are gathered from the web with any branding left intact. The several images show where to measure and what a positive, zero and negative offset wheel might look like. The image of the Fikse wheel cutaway has a lot more definitions for wheel related terms
The hub mounting surface is even with the centerline of the wheel.
The hub mounting surface is toward the front or wheel side of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.
The hub mounting surface is toward the back or brake side of the wheels centerline.
Click the Image to jump to the Wheel Offset Page with LARGER image
Click the above drop down menu for more!