Backspacing

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Nov 29, 2005 | 08:03 PM

Devile

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Backspacing

what is the factory backspacing on factory rims... for a 1991 4x4 ranger???

Nov 30, 2005 | 08:30 PM

Ken00

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From: South Jersey

This thread I found doing a search should help.

https://www.ford-trucks.com/forums/s...d.php?t=213177

Nov 30, 2005 | 08:34 PM

Devile

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that didin't help at all but thanks for trying... i just want to know the backspacing of the factory 15" rims

Nov 30, 2005 | 09:43 PM

Ken00

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Sorry I had that marked as having that info, I don't have anything specific for that year but I think your good with 3.5.

Nov 30, 2005 | 09:45 PM

Devile

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where did you come up with 3.5?

Nov 30, 2005 | 10:01 PM

Ken00

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I did an internet search on the topic for you and that seemed to be the common measurement but it could be a little more, if I wanted to give you a range then I would go as much as 4.

Nov 30, 2005 | 11:04 PM

ranger pat

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From: Elk River, MN

Factory wheel back spacing is given in what is called offset. Your wheels have 1/2" or 12 mm of positive offset. If you have 7" wide wheels, that means the center of wheel would be at 3.5" from each side and the wheel mounting surface would be another 1/2" towards the outside edge of the rim. All newer wheels have the offset value cast into the aluminum or stamped into the rear face of the wheel. On a 7" wheel the back spacing would measure 4". On a 6.5" wheel, the back spacing would 3.25+.5 or 3.75" and on a 6" wheel, the back spacing would be 3 + .5 or 3.5" That's why you might find a range of back spacing on factory wheels, but they are have the same offset of 1/2" towards the outside of the wheel. Hope this helps your original question of what the factory back spacing is.