Tire size?

[Synergy26]

I have a 2020 1500 Eco with 4x4 off road package (I believe includes 1 inch of lift?) Air suspension, 20" rims. I am wondering what size tires I can fit on the stock rims without issue? Thanks in advance.

 

[Zoompastu]

I have the same truck.
Right now your Falkens are 32 x 11.2. Going bigger to a 275/60/20 is 33 x 11 or you could go to a 285/60/20 which is around 33.5 x 11.5. Depending on what tire you pick in the 285/60 size it can fluctuate from 33.2 up to 33.9 tall.

Any bigger than that and you’re going to be stuffed.