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Tonti Wheel Offset

This photo shows how to measure your offset. The WM3 rim pictured here is 73.5 mm wide, so it's center is at 36.75 mm (half the width). With a long straight edge laid across the drive flange and extending past the rim on both sides of the wheel, you can measure the gap from the bottom of the straight edge to the rim. In this case the gap is 1.75 mm. So...1.75 mm plus 36.75 mm equals 38.5 mm which is the offset of this wheel. Stock is 40 mm. Your wheel should be true before checking this.