Forgeline offset/
#1
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Forgeline offset/
I have a 97 993 tt w/ 18x9 Forgeline wheels on front and 18x11 Forgeline wheels on back. Any idea what the offset would be, or the best way to figure it out?
Thank you,
Tim
Thank you,
Tim
#3
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Offset is the difference between the wheel mounting surface (where it meets the hub) and the imaginary centerline of the wheel.
To figure this out, you need to take the wheel off and measure the backspace, the distance from the rim's inside edge to the mounting surface. Next, subtract HALF of the rim's width from the backspace measurement. Convert to metric and voila!, you've got the offset.
11" wheel example
Backspace: 7"
Subtract: 5.5" (half the rim width)
Offset: 2.5" x 25.4 = 63.5mm
Tip: Lay a straight edge across the inside of the rim which you can center over the mounting surface to help you get an accurate backspace measurement.
To figure this out, you need to take the wheel off and measure the backspace, the distance from the rim's inside edge to the mounting surface. Next, subtract HALF of the rim's width from the backspace measurement. Convert to metric and voila!, you've got the offset.
11" wheel example
Backspace: 7"
Subtract: 5.5" (half the rim width)
Offset: 2.5" x 25.4 = 63.5mm
Tip: Lay a straight edge across the inside of the rim which you can center over the mounting surface to help you get an accurate backspace measurement.