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Wheel Size Issue

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Old 10-20-2009, 01:30 PM
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Default Wheel Size Issue

I've looked and looked and decided to bit the bullet and I'm just going to ask you guys.

What is the difference between 17x8 and 17x9 wheels? And what is the difference between 4.50 and 5.00 backspacing?

Thanks in advance.
Old 10-20-2009, 01:40 PM
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If you haven't done so, you may want to read the Wheel FAQ:

https://www.jk-forum.com/forums/show...74&postcount=3
Old 10-20-2009, 01:43 PM
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17x8 wheels means it's 17 inches tall and 8 inches wide.
17x9 wheels means it's 17 inches tall and 9 inches wide.

the back spacing is a little harder... the plate where the wheel attaches to the rotor is closer to the inside part of the rim... so you can run a 1/2 inch wider tire then the wheel with 5 inches of back spacing...

does that help? stock offset is 6.25 inches so 4.5 off set would be like having a 1.75 inch wheel spacer...
Old 10-20-2009, 01:55 PM
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This helps thank you!

If I read right, a 17x8 is better (like when airing down) and haveing 4.50 backspacing will push my wheels out further giving me a slightly wider stance?
Old 10-20-2009, 02:19 PM
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Originally Posted by K2's JK
This helps thank you!

If I read right, a 17x8 is better (like when airing down) and haveing 4.50 backspacing will push my wheels out further giving me a slightly wider stance?
Old 11-05-2009, 06:57 PM
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isnt offset different from backspacing?
Old 11-05-2009, 07:44 PM
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Originally Posted by ARM2004
isnt offset different from backspacing?
He meant backspace, not offset.

But yes, they are different. Open the FAQ linked above for a decent illustration if you're interested.
Old 11-05-2009, 07:51 PM
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5.0 may be to much backspacing it may rub. I have 17 x 9 and 4.5 backspacing, on 33's, no rubbing casual driving or turning, and on the trail my tires rub on the plastic fenders, no lift yet.

I have a conversion chart for offset and backspacing on this thread https://www.jk-forum.com/forums/modified-jk-tech-2/backspacing-vs-offset-grrrr-90926/

Last edited by Goose0077; 11-05-2009 at 07:55 PM.



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