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15x12 on 12.5 tires? backspacing measurements?

Discussion in 'The Garage' started by broncoman6524, Apr 10, 2007.

  1. broncoman6524

    broncoman6524 1/2 ton status

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    ok i bought that truck im builidin its got 2 15x12 steel wheels that i wanna put on my dd k5. its got 33x12.5 bfg all terrains.

    how do i measure backspacing on these wheels? i gotta order 2 and i want them to match LOL. is it front of wheel lip to mounting surface?

    or back of the wheel lip to the back of the mounting surface?
     
  2. scooter122983

    scooter122983 1/2 ton status

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    Inside wheel lip to the mounting surface use a straigh edge and a tape mesure to get a good mesurement.
    Inside/ Axle
    I I
    \_I__I_/
    I I
    I I
    /------\
    outisde
    Its kind of a poor drawing with the key board but hope fully you get the idea
    also measure the bolt pattern for the lugs so the wheel mfr can give you the same wheels.
     
  3. broncoman6524

    broncoman6524 1/2 ton status

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    theyre 6 on 5.5 came off a d44.

    ok so the lower the number of backspacing (5" 4" or whatever) the FARTHER the wheel sticks out form the hub?
     

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