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Wheel Offset


The offset of the wheel is the distance (measured in millimeters) between the portion of the core of the wheel and the line in the center of the wheel. There are three kinds of offset: a zero offset, positive or negative negative.

Zero Offset

The mounting portion of the wheel on the vehicle is inlined in the center of the wheel

Positive Offset

The offset is positive when the center of the wheel is found in the front part of the wheel, in the half which is on the side of the road. This causes the majority of the wheel to be located towards the brakes and suspension components. Positive offsets are typically found on traction cars.

Negative Offset

Unlike the positive offset, the negative will pull the mounting area in half behind the center line of the wheel, leaving more room for the components of suspension and brakes. These wheels considered 'concave' are present on 'tuning' cars, or on trucks with lifted suspension.

The fact of not having a suitable offset for your vehicle can directly affect the compatibility of a wheel on your vehicle, but also your driving, comfort, or even your mechanic. By changing the specifications of the wheel, as the width, it is important to adjust the offset so that the wheels do not come too deported towards the fenders (commonly called aggressive wheels), or simply that the wheels give off enough to not interfere with brakes or suspension.

Bolt circle

How to measure the offset (ET)

  1. Measure the overall width of the wheel in millimeters
  2. Divide the result of step #1 by 2
  3. Put the wheel flat (face up)
  4. Measure the base in millimeters where is supported the wheel up to the vehicle contact surface
  5. Take the result of step #2 and subtract the result of step #4
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