20's on a 2500- what offset?

I decided to go with a 20" rim on my 2500 diesel. Anyone know what offset to look for, or what to stay away from? Thanks- Pat

What size tire and rim width? THis a 4x4?

I THINK a 20x9 with a 5.5" backspace is what folks use if you want to go with a 35" tire (will need a level kit; not a lift kit) on a 4x4.

Check RAM message boards for sure.

thanks- I will