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08 FX4 wheel offset?

   
Old 09-06-2013, 08:10 PM
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Website says minimum is 8.5" wide wheel, is that for their liability?
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Old 09-20-2014, 04:04 PM
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Originally Posted by GATORB8
Its been a while, IIRC, stock offset is around 44mm (5.5" BS on 7.5 Rim)
Sorry for the old thread bump, but just want to make a correction.

According to some online calculators, a 7.5" wheel with 5.5" backspacing equals about +32mm offset.
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Old 09-20-2014, 07:07 PM
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Originally Posted by rkneeshaw
Sorry for the old thread bump, but just want to make a correction.

According to some online calculators, a 7.5" wheel with 5.5" backspacing equals about +32mm offset.
Mathematically the 7.5 wheel with 5.5 backspace has 1.75" positive offset. Multiply that by 25.4mm/inch and you get +44.45mm
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Old 09-20-2014, 11:26 PM
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Originally Posted by PerryB
Mathematically the 7.5 wheel with 5.5 backspace has 1.75" positive offset. Multiply that by 25.4mm/inch and you get +44.45mm
Interesting. I follow your math but that means 2 out of 3 calculators I used online are wrong.



Can't beat the math though, so its got to be +44.

Dang
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Old 09-20-2014, 11:34 PM
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Originally Posted by PerryB
Mathematically the 7.5 wheel with 5.5 backspace has 1.75" positive offset. Multiply that by 25.4mm/inch and you get +44.45mm
l
Originally Posted by rkneeshaw
Interesting. I follow your math but that means 2 out of 3 calculators I used online are wrong. Can't beat the math though, so its got to be +44. Dang
It's because wheel width is not measured from the outer edge of the rim, rather from where the bead seat is. The online calculators are right.

This site helps explain with some diagrams

https://www.rsracing.com/tech-wheel.htm
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