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Backspacing?

Discussion in 'The Garage' started by 84gmcjimmy, Feb 12, 2004.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

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    I was reading someones post and they were talking about backspacing, im new to the 4x4 scene, and im trying to keep up to you smart people in the forums, so I thought you guys could explain what backspacing is, and where it is, or something? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif
    Steve
     
  2. Z3PR

    Z3PR Banned

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    It's the amout of space on the back side of your rims. The lower the number on the backspacing, the deeper the rim looks.
     
  3. az-k5

    az-k5 1/2 ton status

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    The distance from the back edge of the rim to the mounting face (lug holes).
     
  4. 84gmcjimmy

    84gmcjimmy 1 ton status

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    so if theres more backspacing it sticks out more? When you buy rims, do you have a choice?
     
  5. smokkey1

    smokkey1 1/2 ton status

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    [ QUOTE ]
    so if theres more backspacing it sticks out more? When you buy rims, do you have a choice?

    [/ QUOTE ]


    yes....
     
  6. BurbLover

    BurbLover 1/2 ton status

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    [ QUOTE ]
    so if theres more backspacing it sticks out more? When you buy rims, do you have a choice?

    [/ QUOTE ]

    No - The higher the BS, the farther your rim/tire will stick under you vehicle. For most Chevy solid front axle applications, 3.75 is th emost you should have. Otherwise, when you turn, your drivers side tire will interfere with your stearing arm.
     
  7. Beast388

    Beast388 1/2 ton status

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    [ QUOTE ]
    so if theres more backspacing it sticks out more? When you buy rims, do you have a choice?

    [/ QUOTE ]

    Wheel Backspacing Explained

    /forums/images/graemlins/waytogo.gif
     
  8. az-k5

    az-k5 1/2 ton status

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    Some of the responces above are confusing backspacing with offset.

    Backspacing is measured from the inside edge (where the inside tire sidewall sits) to the mounting plate (lug holes).

    Offset is measured from dead center of the wheel to the mounting plate (lug holes).

    A lot of backspacing pushes the tire/wheel assembly toward the frame. Less backspacing pushes the tire and wheel assembly away from the frame. Also there really isn't any such thing as negative backspacing other than a dually type wheel measured incorrectly.

    There is some adjustability when buying wheels. There are more bs options on steel than aluminum though.
     
  9. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    Some of the responces above are confusing backspacing with offset.

    [/ QUOTE ]

    Which is exactly what you just did.

    [ QUOTE ]
    Backspacing is measured from the inside edge (where the inside tire sidewall sits) to the mounting plate (lug holes).

    [/ QUOTE ]

    That is correct.

    [ QUOTE ]
    Offset is measured from dead center of the wheel to the mounting plate (lug holes).

    [/ QUOTE ]

    Correct. Dead center of the wheel you're referring to is in the lateral axis.

    [ QUOTE ]
    A lot of backspacing pushes the tire/wheel assembly away from the frame.

    [/ QUOTE ]

    Wrong. It is the exact opposite.


    [ QUOTE ]
    Less backspacing pushes the tire and wheel assembly towards the frame.

    [/ QUOTE ]

    Wrong again. Once again, the exact opposite.

    [ QUOTE ]
    Also there really isn't any such thing as negative backspacing other than a dually type wheel measured incorrectly.

    [/ QUOTE ]

    Negative backspacing would put the mounting surface inboard of the edge of the sidewall of the tire, and it would be all but impossible to build a wheel that way.

    This is where you're confusing offset with backspacing. A dually wheel would certainly be negative offset, but would be serious positive backspacing.

    Edited as I confused myself for a minute there.
     
  10. az-k5

    az-k5 1/2 ton status

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    [ QUOTE ]
    edited as I confused myself for a minute

    [/ QUOTE ]
    I did the same and didn't proof read slow enough.
    Thanx for the heads up Tim, I had a brain fart. I fixed it.
    sorry it should be better now. /forums/images/graemlins/doah.gif
     
  11. Z3PR

    Z3PR Banned

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    [ QUOTE ]
    so if theres more backspacing it sticks out more? When you buy rims, do you have a choice?

    [/ QUOTE ]Less backspacing would make them stick out more.
     
  12. 81jimmyslt

    81jimmyslt 1/2 ton status

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    While this threads going I have been planning on getting new wheels 15x10 with 2.5 backspacing so I wont have to grind very much on my calipers (D60) should I go that rout or 3.0 backspacing and grind a little? /forums/images/graemlins/thumb.gif
     

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