Wheels & Tires Semi-Tech General discussion of wheels and tires for the Ford Ranger.

Offset ? Backspace? WTH!

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Old Jan 2, 2011
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andddrew says's Avatar
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Offset ? Backspace? WTH!

Okay guys I need help with all this backspace offset stuff. Right now I got moto metals ( listed in sig) and I cannot find the backspace or offset for them and I have heard that the reason I have some bad turning radius ( ontop of having a fabtech spindle lift) is that y backspacing is off. I have spacers.. Thought I would get better turning but does anyone have an idea of what backspacing I need or can clue me In on what it is and how it affects steering? I just wanna get my truck drivable again and ita one thing after another!! I wanna get rid of my spacers and current rims if I can get the correct setup and it will fix my issues..

Regards,
Andrew
 
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Old Jan 2, 2011
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ES894x4's Avatar
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From: Killafornia
google?
https://www.rsracing.com/tech-wheel.html
 
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Old Jan 2, 2011
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Tires that stick out further will have a bigger scrub radius, but shouldn't really have much affect on turning radius. So you probably are just confusing the terms.
Spindle lifts often have a bigger steering stop that decrease the turning radius, which is probably causing your complaint.
 
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Old Jan 2, 2011
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andddrew says's Avatar
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Originally Posted by brianjwilson
Tires that stick out further will have a bigger scrub radius, but shouldn't really have much affect on turning radius. So you probably are just confusing the terms.
Spindle lifts often have a bigger steering stop that decrease the turning radius, which is probably causing your complaint.
I was told my spindle lift would have a great affect on turning radius just not as mich as I thought. If I can't do anything like trim certain parts or get new wheels with better backspacing would help? If not I'll leave it but keep in mind I am using wheel spacers for the front only which I'm not a big fan of but I like the look.
 
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Old Jan 2, 2011
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With or without spacers, the steering wheels are turning to the same angle, that's all I'm saying. I can't see why it would have an impact on steering radius. Without knowing much about the spindles myself, there is a reason for the bigger steering stops. Maybe it is to prevent rubbing on a certain component with stock wheels? Depending on the wheel offset, it could be possible to grind them down. I'm not telling you to go do it, just saying that it could be a reason.

Scrub radius means that, as the wheel center is pushed further away from the pivot point (ball joints), the tire moves forward and back more as you turn the wheel. You can read some of the effects here, and why a bigger scrub radius (as in running spacers) will negatively affect handling. Scrub radius - Wikipedia, the free encyclopedia
 
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Old Jan 2, 2011
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Fabtech calls for a MINIMUM 3 3/4" backspacing. The turning radius won't be helped though. But the rubbing should.

I'll do some looking to try to figure out what yours are.
 
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Old Jan 2, 2011
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TAke off a tire and measure your backspacing. Easiest way to figure it out. Google what backspacing is if you dont know how to measure for it.
 
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