oe ride

I have a 2020 Gladiator Sport that I want to replace the factory OE, Aluminum, 5 Spoke rims with a set of Black Rhino Arsenal, Matte Black, 17 x 8 rims. The choices for the rim offset are -18mm or 30mm offset. I will be keeping the factory Bridgestone Dueler 245/75R17 tires. Which offset will...