Looking at 17x9 wheels - what offset?
12-12-2008, 05:17 PM
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Looking at 17x9 wheels - what offset?
I've found several sites that advertise 17x9 wheels with metric measurements for the wheel offset - one pair is -6mm offset and the other is +12mm offset - anyone know what offset will work well on the JK? I found a couple people talking backspacing but not offset...
FWIW I'm looking at installing some 35's on them.
FWIW I'm looking at installing some 35's on them.
12-12-2008, 05:26 PM
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here's what WOL had to say about it:
WHEELS & TIRES
Q: What is the biggest size tire I can fit on my stock Jeep JK Wrangler?
A: The largest tire size that the factory recommends is a 255/75R17 (which comes standard on Rubicon models) or a 32x10.50. However, there are many Jeep JK Wrangler owners who are currently running as big as 285/70R17 or 33x10.50's with little to no rubbing issues.
Q: What is the biggest size tire that I can I fit with a 2.5" Budget Boost?
A: 33" without any problems and 35" tires with only minor rubbing at a full flex. Depending on how wide your tires are, you may experience some rubbing at a full turn especially if you did not install an adjustable front track bar and/or are still running factory wheels which have 6.25" of back spacing.
Q: What is the biggest size tire that I can fit with a 3" lift?
A: 35" tires and depending on what lift kit you have, you may still experience some minor rubbing up front at a full flex and when turning.
Q: What is the biggest size tire that I can fit with a 4" Lift?
A: 37" tires but you will need to trim the rear corner of the rocker pinch seam and you may still experience some minor rubbing at a full flex.
Q: Will 15" Wheels Fit on my JK?
A: Most steel ones will fit without any problems and depending on the thickness of the wheel most aluminum ones will as well. The only thing you really need to make sure is that the wheel clears the brake calipers.
https://www.jk-forum.com/forums/modified-jk-tech-2/15-x8-rims-17449/
Q: What back spacing will I need on my wheels in order to clear 12.50 wide tires?
A: I would recommend that you do not exceed 4.75" of back spacing and even at that, you may still have some minor rubbing up front at a full turn. Also, I would recommend that you do not go any less than 3.75" as anything less would cause your tires to stick out very far past the fender flares. Any back spacing within this range should work out great.
Q: What is backspacing?
A: The distance measuered from the mounting surface of your wheel to the outside edge of the rim - see diagram below.
WHEELS & TIRES
Q: What is the biggest size tire I can fit on my stock Jeep JK Wrangler?
A: The largest tire size that the factory recommends is a 255/75R17 (which comes standard on Rubicon models) or a 32x10.50. However, there are many Jeep JK Wrangler owners who are currently running as big as 285/70R17 or 33x10.50's with little to no rubbing issues.
Q: What is the biggest size tire that I can I fit with a 2.5" Budget Boost?
A: 33" without any problems and 35" tires with only minor rubbing at a full flex. Depending on how wide your tires are, you may experience some rubbing at a full turn especially if you did not install an adjustable front track bar and/or are still running factory wheels which have 6.25" of back spacing.
Q: What is the biggest size tire that I can fit with a 3" lift?
A: 35" tires and depending on what lift kit you have, you may still experience some minor rubbing up front at a full flex and when turning.
Q: What is the biggest size tire that I can fit with a 4" Lift?
A: 37" tires but you will need to trim the rear corner of the rocker pinch seam and you may still experience some minor rubbing at a full flex.
Q: Will 15" Wheels Fit on my JK?
A: Most steel ones will fit without any problems and depending on the thickness of the wheel most aluminum ones will as well. The only thing you really need to make sure is that the wheel clears the brake calipers.
https://www.jk-forum.com/forums/modified-jk-tech-2/15-x8-rims-17449/
Q: What back spacing will I need on my wheels in order to clear 12.50 wide tires?
A: I would recommend that you do not exceed 4.75" of back spacing and even at that, you may still have some minor rubbing up front at a full turn. Also, I would recommend that you do not go any less than 3.75" as anything less would cause your tires to stick out very far past the fender flares. Any back spacing within this range should work out great.
Q: What is backspacing?
A: The distance measuered from the mounting surface of your wheel to the outside edge of the rim - see diagram below.
Last edited by fish; 12-12-2008 at 05:35 PM.
12-12-2008, 05:44 PM
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I run 5.75" backspacing on my 17" wheels; however, my suspension is setup and tuned to allow this without rubbing. Very effective at keeping the mud and water under the flares with the doors off and running 35's!
12-12-2008, 05:57 PM
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ok - IF I figure it right - +12mm offset is about 1/2" offset - and on a 9" wide wheel that would be 5" of backspacing? (4.5 is 0 offset and add .5" for the 12mm positive and thus 5" backspace?)
Sound about right?
Oh and I'm going up to a 4" lift kit...
Sound about right?
Oh and I'm going up to a 4" lift kit...
)
12-12-2008, 06:22 PM
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you beat me to it. that was the same chart I was about to post. 
That is exactly what you need!
Yo can see on that chart that my 8.5 inch wheel with 5.75" BS is equal to +25MM offset.
That is exactly what you need!Yo can see on that chart that my 8.5 inch wheel with 5.75" BS is equal to +25MM offset.
03-04-2009, 01:58 PM
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Did you used spacers for that? I am thinking 35 on mine to save on rims.
A
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03-04-2009, 02:01 PM
#8
JK Super Freak
