I'm trying to purchase a set of rims for my Supreme and looking at the 20" Boss 338 Gunmetal Grey. What is the largest width I can go in the back? I was hoping to stagger them with a 20" x 10 in the back with a 20" x 8 or 9 in the front. I dont want to use a spacer and I don't want mess up the tires. If anyone can give me some advice it would be appreciated. Also is the bolt pattern 5x4.75 standard for all or would I need to look at a different pattern as well? I have a set of 14" SSII on there currently that I'm going to clean up and keep.

Need some assistance fellas