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difference of off set

Discussion in 'Wheels & Tires' started by cantac09, Oct 25, 2010.

  1. Oct 25, 2010 at 10:26 PM
    #1
    cantac09

    cantac09 [OP] Official TW Igloo Builder

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    right now on my truck i have moto metal 955's that have a -12 off set and 4.5 inch backspacing. i need to have 4.5 inch backspacing because of my lift. i am looking for some winter wheels and im looking into the atx mojave and they have the same back spacing but instead of a -11 off set they have a 00 off set. so what i am wondering is what will the difference be? and really what the hell does off set mean?
    thanks
     
  2. Oct 25, 2010 at 10:38 PM
    #2
    senna

    senna Well-Known Member

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    Off set is the difference between the the hub mounting surface and the center line of the wheel, the back spacing is the dsitance from the hub mounting surface and the inner bead (0n the outside not the actual tire seat).
     
  3. Oct 25, 2010 at 10:40 PM
    #3
    cantac09

    cantac09 [OP] Official TW Igloo Builder

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    so what will the difference in looks be?
     
  4. Oct 25, 2010 at 10:41 PM
    #4
    08pretaco

    08pretaco Almost there

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    o offset with a 4.5 bs is a true 4.5 bs. a 4.5 bs with -12mm offset is 5 bs IIRC
     
  5. Oct 25, 2010 at 10:43 PM
    #5
    cantac09

    cantac09 [OP] Official TW Igloo Builder

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    well i just need to have 4.5 inch backspacing it didnt mention anything about off set. so i should be ok then?
     
  6. Oct 25, 2010 at 10:44 PM
    #6
    08pretaco

    08pretaco Almost there

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    ya as long as bs is 4.5 and nothing is mentioned of offset
     
  7. Oct 25, 2010 at 10:45 PM
    #7
    cantac09

    cantac09 [OP] Official TW Igloo Builder

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    ok thanks for your help
     
  8. Oct 25, 2010 at 10:46 PM
    #8
    08pretaco

    08pretaco Almost there

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    im running 951 with 4.5 and when i had my OME 3" worked out very well!
     
  9. Oct 26, 2010 at 6:10 AM
    #9
    KPT

    KPT sees what you did there.

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    Backspacing is calculated by using offset and rim width. If the two wheels you are looking at have the same backspacing, but a different offset, then by definition the wheels are not the same width. Check this chart (1/3rd down the page) to double check that both you are looking at are 4.5" BS.

    http://www.rsracing.com/tech-wheel.html
     
  10. Oct 26, 2010 at 7:24 AM
    #10
    08pretaco

    08pretaco Almost there

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    Haha i was hoping you would chime in! I have to remember that website
     
  11. Oct 26, 2010 at 7:29 AM
    #11
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Backspacing is backspacing regardless of offset. 4.5 BS is 4.5 BS no matter what the offset is.

    Visual reference:

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

    offset

    [​IMG]

    Backspacing

    [​IMG]
     
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