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Backspacing vs Offset: Title Fight

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Old May 9, 2007 | 11:10 PM
  #1  
mikedeason's Avatar
mikedeason
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Arrow Backspacing vs Offset: Title Fight

Can someone explain the relationship between the 2.

According to this offset calculator, the wheels I want will stick out 35mm more than stock (which is fine) but the backspacing is also different and there is no where to input it.

BTW if you use this calculator you have to put a + or - sign beside your offset number.

http://www.1010tires.com/WheelOffsetCalculator.asp
 
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Old May 10, 2007 | 12:06 AM
  #2  
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blackhat620
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From: Arizona
Here you go.

"4. Offset. The distance from the centerline of the wheel to the face of the mounting surface of the wheel that contacts the hub."

"5. Backspacing. The distance from the mounting surface to the inside lip of the wheel. This measurement is closely related to offset (without actually measuring, backspacing is about equal to [Wheel Width / 2] + [Offset] + [about 1/4] )."

www.customtacos.com/tech/index.php?article=40
www.discounttire.com/dtcs/infoWheelOffsets.dos
www.rsracing.com/tech-wheel.html

Hope this helps
 
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Old May 10, 2007 | 01:11 AM
  #3  
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RACERX7775
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From: WARRINGTON, PA
i have an 01 excursion and i have 22X10 wheels. i have a +12 on mine. fits perfectly under the wheel well.
 
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Old May 11, 2007 | 12:27 AM
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mikedeason
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Game Over for Backspacing.

The difference in offset is non sequential to say the least.
 
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