How do I measure back spacing on a rim?

Discussion in '40- & 55-Series Tech' started by albee, Aug 5, 2005.

  1. albee

    albee

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    I am thinnking of buying a set of rims from a friend who does not know what the back spacing is.
    Do I need a 10" or 12" rim for 33"x12.5"x15"
    I know I need a six lug rim, but is 5.5" correct.
    thanks
     
  2. woody

    woody unhelpful spotter Staff Member Admin

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    http://www.skulte.com/adapterfaq.html (google search, 1st link...)

    6 on 5.5" is correct....honestly, IMO, you need an 8" rim for a 12.5" section width tire, but 10" will work.

    12" rims on a 12.5" tire has been done, best saved for the "pimp my ride" types tho...
     
  3. Yoda

    Yoda

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    I like this photo of measuring
     
    Last edited: Jan 27, 2006
  4. albee

    albee

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    Thanks that helps.
     
  5. gulp3000

    gulp3000

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    You can also just lay the rim on the floor, backside down, and measure from the floor to the mounting surface.
     
  6. Mr. Toad

    Mr. Toad

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    The 5.5" is NOT the backspacing.

    6 on 5.5 refers to the bolt pattern.
     
  7. Clyde-2

    Clyde-2

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

    Try this site. Lots of tire & rim info.
    Just put a new set of white steelies on my 75.
    They have 3.5" back spacing 3.25" would be perfect, but
    I have to run a 1/4" space plate behind the right front because
    it's very close.
     
    Last edited: Oct 25, 2006
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