20" rims best setup

[AllTerrain66]

Hi all! Looking to upgrade to 20 inch wheels on my 21 Ecoboost but I'm keeping the stock suspension for now. I've heard mixed things about certain offsets, especially up front.

I'm running the stock 18s right now and want to make sure I don't run into clearance problems. What offset range should I be targeting for 20s to be safe? I'm looking at 20x9 or 20x10 in the rear.

 

[AllTerrain66]

Thought this will be more active, but maybe I posted in the wrong thread. Anyways, heres the update. For the 20x9 size +30 offset is a golden standard. Widest fronts you can get are 20x10 with 285mm tire with higher offset). For the rear 20x10.5 you need higher offset to avoid rubbing. 42mm looks to be safe for this size per carid https://www.carid.com/wheels/chrome/20-inch/ just got off the phone with them