Wheel Measurements

Wheel Measurements

Diameter - Measured radially at the flattest portion of the bead seat.

Wheel Width - Measured transversely at the most vertical part of the bead seat.

Overall Rim Width - Measured transversely at the outside of the rim.

Rear Spacing or Backspacing - Measured transversely from the inside rim face to the mounting surface.

Offset - Distance from the center of the rim plane to the mounting surface plane. To calculate offset, use
Offset = Backspacing - Overall Rim Width/2


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