Stock Backspacing on pre Tacoma PU's

Discussion in '05+ Tacoma, T100, Highlander' started by Jukelemon, Nov 7, 2005.

  1. Jukelemon

    Jukelemon

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    I am wanting, if possible, to run a set of fj40 wheels on my Toyota truck. Std backspacing for 40 wheels is 3.5". So, are they the same AND does anyone know if the front disks will clear?

    Thanks.
     
  2. Jonathan_Ferguson

    Jonathan_Ferguson ★ is in the wrong locale SILVER Star

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  3. Jukelemon

    Jukelemon

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    Thank you BUT I am not sure how to turn your offset measurements into mine.
     
  4. theo

    theo

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    Found the following at http://www.tyres-online.co.uk/techinfo/alloy.asp

    "The ‘Offset’ of a wheel measures the distance between the wheel centreline and the wheel mounting face and is measured in millimetres. It is extremely important that wheels of the correct offset are used in order to maintain the correct track of the vehicles.

    Offset can be Positive or Negative and is best illustrated in the two diagrams on the left. Most Modern vehicles are front-wheel drive, and as such generally require positive offset wheels. The main exception to this rule is 4x4 vehicles, which often use negative offset wheels."

    And the following at http://member.rivernet.com.au/btaylor/BMWText/technical/OffsetExplained.html

    "Offset is the dimension between the centerline of the wheel (halfway between
    the tire bead seats), and the mounting surface. Positive offset tucks the
    wheel closer to the car. A 10mm spacer reduces the offset by 10mm."

    These two "sources" (such as they are, worth what I paid I guess) seem to disagree about which direction is positive! (Pic goes with the first description.)
    wheel offset.gif
     
  5. Bob_Garrett

    Bob_Garrett

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    If it's a solid front axle truck, they will work fine. That's exactly what I'm running on my 83.
     
  6. Jukelemon

    Jukelemon

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    Mine is a 92 so no to the SFA. You guys with IFS, what is your BS?
     
  7. theo

    theo

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    Mine are 4 3/4" ('86 w/IFS)
     
  8. Bob_Garrett

    Bob_Garrett

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    A 3.5 bs will work with ifs, but the wheel will set 1.25" further out (or more if the wheel is wider) and put more stress on suspension components. Might degrade straight line tracking as well.
     
  9. Jukelemon

    Jukelemon

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    The wheel I am speaking of is a 15X6 or 15X5.5 JJ i.e. std steel wheel on a 40. Do you think that will compromise the suspension? I would not think so but I am so stuck in 40 tech I might not be seeing it right.
    Thx guys, keep it coming.
     
  10. Jukelemon

    Jukelemon

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    From my research, it looks like 4.25 is the std BS on pickups and 4 runners in the 90's.
     
  11. Bob_Garrett

    Bob_Garrett

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  12. bkg

    bkg

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    a lot of 4runners came with a steel 15x6" wheel. I wouldn't go any narrower, ever...
     
  13. Jukelemon

    Jukelemon

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    I ran 16x5.5's on my 40 ( :
     
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