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- - Rim question (https://www.dieseltruckresource.com/forums/off-road-4x4-111/rim-question-93339/)

Ian	Feb 22, 2006 08:00 PM

Rim question

what exactly is backspacing? alot of people talk about it, but I don't know what it is...what a newbie question... [laugh]

phox_mulder

Feb 22, 2006 08:33 PM

Measurement from the inside mounting surface of the rim to the inside edge.

Stock rims are around 6.25 inches,
most aftermarket are 4.5 inches.

phox

Ian	Feb 23, 2006 08:15 PM

ahhh...i see, i see...and the less back spacing, the more the rim and tire will stick out past the side of the vehicle?

derek840378

Mar 1, 2006 02:28 AM

Quote:

Originally Posted by Ian

ahhh...i see, i see...and the less back spacing, the more the rim and tire will stick out past the side of the vehicle?

correct ;)

slorocco

Mar 1, 2006 09:41 AM

Just in case you're interested: The alternate measurement that's used by some wheel manufacturers is Offset. This is a measurment of how far the wheel mounting surface is offset from the centerline of the wheel, specified as positive or negative offset depending on if it's offset to the outside or inside.

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