Wheel offset and wheel size

Does wheel size play a role in what offset you choose?

For instance, if I want to fit 37s and I am choosing between 17” and 18” wheels, do I choose the same offset regardless of which size I choose?

I purchased some 17” Methods with +25 offset. I’m hoping I made the right choice because I mostly see +25 offset on 18” when people are running 35s or 37s. I realize there are many factors to make the 37s fit, I’m just wondering if the wheel size dictates in any way what offset you choose.

 

If you are planning a big brake kit in the future to account for heavier tires I would stick with 18s. +25 should be fine, but will probably need to do some other modifications for 35 or 37 depending on lift.

 

Thanks for the response. Alcon makes a big brake kit that fits with 17” wheels.

https://alconkits.com/products/heav...-present-front-rear-complete-brake-kit-detail

 

And, they’re frickin’ awesome…

 

Yowza. I’m sure they are worth every penny but I’ve only got two kidneys… haha.

To the OP’s question, wheel diameter doesn’t matter when it comes to offset unless they create a clearance issue with the caliper as mentioned earlier. Wheel WIDTH, however, does matter when talking offset. If you compare two wheels with the same diameter and offset, but one is 8” wide and the other is 9” wide, the 9” wheel will both tuck in to the fender an extra 1/2” closer to the upper ball joint AND poke out of the fender an extra 1/2”. If, for example, you wanted to maintain the factory 18x8 +60 wheel clearance to the UBJ but you increase the wheel width by an inch to 18x9, you would need a +47 offset (if that were available).

 

Excellent information, thank you! I went with a 17x8.5 wheel with +25 offset. I’m hoping for a little bit of poke.

I currently am running 20x9 with +20 offset and there is quite a bit of poke. How would I calculate what the difference will be between these 2 different wheels in terms of how much they poke?

 

Inner edge of new wheel will be 1mm further out.
Outer edge of new wheel will be 11mm further IN, giving you about 7/16” less poke.

 

Awesome, thanks for the link, that’s a good tool.

So 7/16” less should still give me a little poke. Sounds like I made the right choice.