I have stock 2014 rubicon wheels on my 2012 JKU with 1.5 wheel spacers. I would like new wheels. If I want to eliminate the spacers, how do I calculate what offset I would need?

 

What is your tire size? I have a 14 Rubi. Tires 315/70/17. Have 17" Fuel Hostage with 4.5 backspace. Not rubbing

Here is a calculator that might help.

https://www.customwheeloffset.com/ti...et-calculators

 

I will give it a look! Thanks
285/70/17

 

Offset uses the specific rim width in the calculation, so it is more difficult to work with. Easier to convert the number to backspace and use that. Stock rims are roughly 6.25" bs, minus the 1.50" spacers, means you currently have a 4.75" effective backspace.

Offset - positive numbers are further in, negative numbers are further out.
Backspace - higher numbers are in (6.25" stock), lower numbers out (4.75" w/spacers)


I like that calculator whtjkur, sure is easier than doing the math to figure it out!

 

with 285/70-17's you can almost get away with just the stock rims and no spacers. I did for a while and only rub a little at full turn on the sway bar. 4.5-5.2 Backspacing will give no issues whatsoever tho.

 

With 285s on stock rim, I have read that there is a way to adjust steering stops that will stop minor rubs

http://project-jk.com/jeep-jk-write-...top-adjustment

When you click on the tech tip link it provides the following details. http://wayalife.com/showthread.php?4...top-Adjustment

 

I disagree with just using backspacing.

Using wheel offset with wheel width will allow you to more accurately place your tire.

An example is a 8.5" wide wheel with 4.5" back space has an offset of ~ -6mm and a 9" wide wheel with a back space of 4.5" has an offset of ~ -12, but the 9" wide wheel will be move the entire tire out 0.2"

A thinner wheel requires less back space to gain the same clearance as a wider wheel.

So a 9" wide wheel with an offset of -6mm will give you a back space of ~ 4.8", but will put the tire in the same spot as a 8.5" wide wheel with an offset of -6mm and Back space of 4.5"

I use this site because it will allow you to see where the tire is compared to stock. Which is 7.5" wide wheel with a +44mm offset and effectively 6" backspace.

Custom rims, wheel tire packages for your ride - RIMSnTIRES.com

 

I agree that offset can be more accurate, but for the majority of people asking this question, what do you think they will actually do? Spend time doing math and figuring out optimum placement, or just "a post I saw said I need a 4.5" backspace or -12mm offset, so that's what I got..." or "the guy at the counter said these will fit, so that's what I got..."

I would go out on a limb and say that it will not be the offset formula. Or maybe I'm wrong. But I'm not...

 

I understand your point. I just dislike when I see 4.5" back space posted every where when really it depends on your wheel width.
The other issue is when looking up wheels more often than not they are speced in width and offset.

 

5 is pushing it. I had a 17x9 with 5 and my 35x12.5 rubbed the control arms bad. When to like a 4.3 and no rubbing