Help with tires/spacer

[Lena Phares]

I have a 2018 3500 GMC Denali
current tires: 235/80R17
tires to be installed: 285/70R17 (I already have them )
What spacer and where do I order the correct spacer for this to work? My tire shop only carries EZ ½” spacers, so they told me to research the one I’m going to need and order it for them to install since theirs won’t work and they don’t carry anything else. 

I haul a lot. I pull a 34’ gooseneck 4 horse with living quarters. 
I will be having it leveled at the same time as tire install.

I just want my working truck to be able to do it’s job a little dressed up. 
Can someone please give me some guidance? Be nice.

[dieselfan1]

Try this place....
www.customwheeloffset.com



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[dieselfan1]

Something like this....

https://www.customwheeloffset.com/store/spacers/26330/pair-of-steel-1in-stahl-spacers

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