JRichards

hey, new to the forum. I'm sure this has been answered before so i'm hoping someone can help me out. I have a 2015 Silverado 1500 with stock 18 inch rims. I just ordered a Motofab 2.5 front and 2 inch rear level. I want to add 33 inch tires. i'm thinking 33x12.5r20 or 305/55r20. Both with aftermarket rims. problem is i don't know anything about backspacing and/or offset. i don't mind using zip ties on the inner fender well liner and a little rubbing on the control arm at full lock. I can deal with that. what's the best offset to get to avoid rubbing as much as possible? Thank you for the info.