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How is this possible?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JORGE, Feb 9, 2003.

  1. JORGE

    JORGE 1/2 ton status

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    VITORIA-GAZTEIZ(ALAVA)BASQUE COUNTRY,SPAIN
    Sorry guys,i hat to be so bored /forums/images/graemlins/blush.gifwith the wheels questions,but it is driving me crazy. /forums/images/graemlins/rotfl.gif

    If we have a 10" widht wheel with a -39mm Offset,
    How the hell it can to have a 4" Backspacing??

    Widht /2 = Centerline
    10" / 2 = 5"

    Centerline-Offset = Backspacing
    5" - 1.5"(39mm) = 3.5"

    ¿¿ 4"?? /forums/images/graemlins/confused.gif
     
  2. wrathORC

    wrathORC 1/2 ton status

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    Maybe they don't know the conversion factor. Who knows. It could be anything. I call 3.75" and 4" backspaced wheels 4" because they're so close and if you measure it the wrong way you'll end up with 4" anyway.

    Just measure from the mounting surface to the spot where the outside of the bead would be and call it a day.
     
  3. Chris_T

    Chris_T 1/2 ton status

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    Offset and backspacing are calculated slightly different, but I don't remember how. PM Steve Chin or search and you might find it.
     

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