Trying to understand offset as it relates to backspacing? Looking at these wheels. - JeepForum.com
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Unread 03-30-2011, 10:46 PM   #1
Rubi Unlimited
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Trying to understand offset as it relates to backspacing? Looking at these wheels.

So..... Backspacing is from the inner mounting surface of the wheel to the inside rim of the wheel.

Wheel offset as I understand it is how far off the actual center line of the wheel the mounting surface is.

Would I need wheel spacers to run this wheel if I was going with 255/80r17 on a 3.5 inch OME lift (2005 Unlimited Rubicon)? It is the wheel offset that has me baffled. As I understand it 4 inch or 3.5 inch backspacing does not require spacers these wheels are 4.75 which I would presume would need the spacers. But does that have anything to do with or account for an individual wheels offset?

I have found some wheels I like (Raceline Renegade 5 wheels)
The manufacturer site
http://www.racelinewheels.com/p-648-17-renegade-5-black-machined.aspx

Here they are being pushed by Discount tire on another forum.
http://forums.off-road.com/discount-tire-direct/235460-raceline-renegade-5-forum-member-special.html



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Unread 03-31-2011, 01:56 AM   #2
RogueSpear2023
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Those wheels have 0mm offset, and 4" of BS so to run them you will need spacers to use them.
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Unread 03-31-2011, 06:14 AM   #3
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Quote:
Originally Posted by RogueSpear2023 View Post
Those wheels have 0mm offset, and 4" of BS so to run them you will need spacers to use them.

Actually they have 4.75" which is even worse than 4" and I presume spacers to be necessary just wanted to make sure.

But as to the other question how does offset correlate to or effect backspacing if at all.
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Unread 03-31-2011, 06:34 AM   #4
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http://www.customtacos.com/tech/index.php?article=40
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Unread 03-31-2011, 11:12 AM   #5
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So Offset has no relavence to backspacing and you do not add or subtract it from the backspace number to find an "actual backspacing" number. OK thanks.
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