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Suspension Tech General discussion of suspension for the Ford Ranger.

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  #101  
Old 11-10-2013
RazorEdge's Avatar
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Wheel "backspacing"...

So...If I understand what you are telling me the "backspacing" is a given line (plane) and a wheel with a zero backspacing the mounting surface of the wheel is dead center or that given plane. A 10" wheel with a 5.0" setback would have the mounting flange 5.0" deep in the reverse side of the wheel. Actually the backspacing of any given wheel is actually (for all intents and purposes) the distance the "center" (the rear mounting flange) is "setback" from the front of wheel. I.E., a 10" wheel with 7" of backspacing would leave the mounting flange 3" from the rear plane of the wheel (from where the plane is in the position of your illustration).

Last edited by RazorEdge; 11-10-2013 at 09:53 AM. Reason: Wrong terminology...
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  #102  
Old 11-10-2013
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Quote:
Originally Posted by RazorEdge View Post
Actually the backspacing of any given wheel is actually (for all intents and purposes) the distance the "center" (the rear mounting flange) is "setback" from the front of wheel. I.E., a 10" wheel with 7" of backspacing would leave the mounting flange 3" from the rear plane of the wheel (from where the plane is in the position of your illustration).
No - backspacing is defined as the distance from the back (aka - inboard side) of the wheel to the nearest mounting surface. It has nothing to do with a measurement from the 'front side' of the wheel.

I've never head the term 'setback' before - so you can call it whatever you want too, it's not an industry standard I've ever heard of. lol

Again, this topic/question really should be created in the wheels & tires section. It has nothing to-do with torsion bar cranking.


Another few examples:



Attached Thumbnails
Torsion Bar Cranking-htup_0807_05_z%252bmeasuring_backspacing_and_calculating_offset.jpg   Torsion Bar Cranking-backspace01.gif  

Last edited by logan03CO; 11-10-2013 at 10:21 AM.
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  #103  
Old 11-10-2013
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OK...so If I want the mounting flange to be closer to the inside flange of the wheel I am wanting a greater backspacing number...right?

And thanks for the illustrations...they were a great help.

Thank you...

RazorEdge
James E. Griffin
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  #104  
Old 11-10-2013
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Originally Posted by RazorEdge View Post
OK...so If I want the mounting flange to be closer to the inside flange of the wheel I am wanting a greater backspacing number...right?
No.

I'll answer your questions in your new thread here: https://www.ranger-forums.com/wheels...pacing-140087/
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