RC 4.75 lift

[Aquadump]

So as the title says I'm looking to install a RC 4.75 lift on my truck 14 chevy 1500 of course, I'm just having trouble figuring out how big of a tire I can run on stock 18" rims? These will be my winter wheels, I eventually want to run 20x12 with a -44 offset any help would be greatly appreciated thank you very much

[blackout07]

I just should bash RC in my sig so I don't always have to rewrite it. But anyway if that's your choice for such an expensive truck then continue. But you will have major clearance issues with the 12" wides, and I would stick with a 33-ish tire for stock.

[Aquadump]

So even with the truck lifted you still think I will have clearance issues with the 20x12?