Backspace/offset measurements

[USAZR1]

Back spacing - The measurement from the mounting pad/hub to the inner edge of the wheel.
Offset - The offset of the wheel is the distance from the mounting pad/hub to the centerline of the wheel.



Negative offset - When the mounting surface is closer to the disk/drum (Inside) of the wheel. Or the mounting pad is behind the centerline of the wheel. This type of wheel is commonly referred to as a deep-dish wheel. This offset is common in older vehicles and many of today's trucks and will bring the wheel/tire combination out away from the vehicle.
Positive offset - The mounting pad is forward of the centerline of the wheel, towards the street side of the wheel. This is common in most front wheel drive cars and some newer trucks. Generally speaking a positive offset wheel brings the wheels closer to the center of the vehicle.