Offset question

[triten]

I just took delivery of a 2021 sport s max tow.

Going to be installing clayton 2.5 ride rite lift.

The rims i am looking at come in 2 flavors and im not sure which one i need to buy

37" Toyo AT3 tires

Fuel Siege

18"x9" with a +1 offset and 5.04 backspacing.
or
18"x9" with a -12 offset and 4.53 backspacing

Which configuration do i need or what is the difference?

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[Kevin_D]

First, you can ignore backspacing, as offset has replaced it as a specification.
The stock Sport/Sport S wheel has a 45(?)mm offset, and is a 7½" wide wheel. As you go wider with the wheel, you can effectively subtract 13mm for each inch from the stock offset, so a 9" wheel will yield an effective offset of 25mm for an wheel position the same as stock.
So the +1 offset will put the wheel about an inch further out, and the -12 will move the wheel about 1½" out.
Depending on how wide the tire is, you may want the lower offset to avoid rubbing.

 

[FLGladiator]

I went with the +1 and it's about 1-2" outside of fender.

 

[triten]

Ok cool thanks for the info

 

[Rummie]

To add to the great info in the thread already, here is a good visualizer of what different offsets will look like with different tire sizes.

https://tiresize.com/wheel-offset-calculator/

 

[bgoman]

Clayton recommends 4.5"-4.75" of backspacing. But it looks like you'll have rubbing anyway with the 37's so you may not care.

Negative offset sticks the tire (wheel) out further, positive does the opposite. I believe stock sport wheel are +44mm offset, as a reference.

I had a very similar question: https://www.jeepgladiatorforum.com/...measurements-with-3-5-lift.37636/#post-609901

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