Offset is the measured distance between the hub mounting surface and the center line of the rim. A positive offset occurs when the hub mounting surface is on the street side (the side you see) of the center line of the rim. Most factory rims will have this type of offset. When the hub mounting surface is centered within the rim, it is known as a zero offset. If the hub mounting surface is on the brake side of the center line of the rim, it is considered a negative offset or "deep dish".vw151 said:I have a good idea of what offset is but do you think you could give me a more solid description.