Back spacing/Offset

Discussion in 'Wheels & Tires' started by 05F150XLT, Jul 6, 2012.

  1. 05F150XLT

    05F150XLT Member

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    I can kinda grasp the concept of back spacing and offset, but just to be sure I don't buy something then I am not happy with it can any of y'all post pics if you have aftermarket wheel that are 9 inches wide, and let me know what your bs/offset is? thanks!!
     
  2. cowboy

    cowboy Sheriff

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    Offset - is the distance from the center line of the rim to the hub mounting surface.

    Backspacing - is the distance from the back edge of the rim to the hub mounting surface.


    examples:
    a rim width of 9" that as 0mm of Offset has backspacing of 4.5"
    the same rim that has -25.4mm of Offset has backspacing of 3.5"
    the same rim with +25.4mm of Offset has backspacing of 5.5"
     
    Last edited: Jul 6, 2012
  3. 05F150XLT

    05F150XLT Member

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    They are very similar measurements, but not the same... The wheels that I looked at today had 4.56" of back spacing, and a -12mm offset. Since I am not home, and able to measure myself I would like to see what people's set ups look like.
     
  4. Big'un

    Big'un BillyBadAss

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    my old truck with 17x9 with -12 offset

    [​IMG]
    [​IMG]
    [​IMG]
     
  5. 05F150XLT

    05F150XLT Member

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    Do you remember what the backspacing was? And thanks for the picture, that's the kind of responses I am looking for.
     
  6. joh408

    joh408 Full Access Member

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    Here's a chart with good info:
    [​IMG]
     
  7. Big'un

    Big'un BillyBadAss

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    4.5"
     

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