New rim offset?

[2010gmcyukon]

I'm a little murky on wheel offset, so would like to confirm that I understand correctly. I currently have OEM 20x8.5 rims, with what I believe is 31mm offset.
They look like this: https://www.oewheelsllc.com/GMC-Yukon-Wheel-Polished

I'm looking at a set of replacement rims that are 20x9. I have the option of either 12 or 0 offset. I'm trying to figure which offset is more appropriate.
I expect they will stick out a bit more than the factory wheels, but I don't want them sticking out too far.

Is this correct thinking?
If I choose the 12mm offset, the wheel would stick out approximately 19mm (3/4") more than it does now? How does the additional 1/2" wheel width come into play?

 

[swathdiver]

Stock 20s for our trucks have offsets of 22, 27 or 31. Yours is 31 mm. Stock 22s have offsets of 24 or 31 millimeters.

IMO, neither is appropriate, they will push the wheels out too far. Ask the manufacturer to make them to your spec or get some custom wheels made to fit right.

 

[drakon543]

i dont even know here as ive been questioning my typical rim spec decisions alot. i used to base my decisions on spec offers on what was listed at tire rack and discount tire. both sites atleast in the past have been known to only show you what will safely fit your listed vehicle. i see similar results when pulling up your vehicle as my current traitor suv (mountaineer). everything from the 30 and 40 offset range to 0 and that seems like a pretty big difference to me. im not sure why none of these sites have started doing a front view showing where your tire would land. i dont think it would be that hard to have thier view on vehicle space the wheel out appropriately based on factory offset vs the rims your looking at. i like the flush with the wheel well look or maybe a smidge out. these trucks im seeing with more than an inch of tire sticking out. far as i know most states have restrictions on that so im not sure how they aren't being pulled over for it.

 

[Joseph Garcia]

If your tire sticks out beyond the fender, you will get road debris constantly being thrown up against your lower door and rear painted panels, and that will eventually pit the paint and remove the paint's clear coat, just like rubbing them lightly with fine sand paper every day. To me, these trucks are too expensive to damage the panels and paint, when we can avoid it.

To assist you in getting a good idea on whether or not specific alternate wheel/tire combinations 'may' fit your truck, and how much the tire will protrude beyond the fender, I recommend that you use the wheel/tire comparison app at the URL listed below. You can use this app starting with your existing wheel/tire combination as a benchmark, and measure the actual critical fender and suspension component clearances as directed by this app. Then, you can enter alternate wheel/tire combinations, and this app will give you the projected changes in these critical fender and suspension component clearances.

https://www.wheel-size.com/calc/

I used this app for determining whether on not I could use my current alternate wheel/tire combination, and it accurately projected the changes in critical clearances.

 

[2010gmcyukon]

Thanks for the feedback guys. As Drakon mentioned above, I was looking at DiscountTire's site, where I've had good luck before. Most of the rims I'm looking at have either 0 or 12 offset, so I just assumed that was reasonable. I'll keep looking for other options. I also appreciate the link to the measurement website. That helps!

 

[Fless]

Your OE rims should have the offset and size cast into the backside of the wheels.

 

[EvergreenZ71]

If your tire sticks out beyond the fender, you will get road debris constantly being thrown up against your lower door and rear painted panels, and that will eventually pit the paint and remove the paint's clear coat, just like rubbing them lightly with fine sand paper every day. To me, these trucks are too expensive to damage the panels and paint, when we can avoid it.

To assist you in getting a good idea on whether or not specific alternate wheel/tire combinations 'may' fit your truck, and how much the tire will protrude beyond the fender, I recommend that you use the wheel/tire comparison app at the URL listed below. You can use this app starting with your existing wheel/tire combination as a benchmark, and measure the actual critical fender and suspension component clearances as directed by this app. Then, you can enter alternate wheel/tire combinations, and this app will give you the projected changes in these critical fender and suspension component clearances.

https://www.wheel-size.com/calc/

I used this app for determining whether on not I could use my current alternate wheel/tire combination, and it accurately projected the changes in critical clearances.

Great information and site link. And for once the search took me to very relevant topics as I’m trying to find wheel replacement info to take my 2009 Tahoe LTZ from OEM 20” rims down to 17” to let me use chains in the snow (plus I want to switch to black as part of my project to get as much chrome off as possible).

By any chance do you still have the measurements you used for it? If it worked for you I’d trust those measurements over me trying to manually measure all of it.

 

[Joseph Garcia]

Great information and site link. And for once the search took me to very relevant topics as I’m trying to find wheel replacement info to take my 2009 Tahoe LTZ from OEM 20” rims down to 17” to let me use chains in the snow (plus I want to switch to black as part of my project to get as much chrome off as possible).

By any chance do you still have the measurements you used for it? If it worked for you I’d trust those measurements over me trying to manually measure all of it.

I do not. You'll have to take the measurements for yourself on your Tahoe. IMO, that is really the best way to go, as well, as the actual measurements on each truck can be slightly (or more) different.