Mark and Kim Smith wrote:

As part of a project I'm making, I need to make a 4' ring. The outer
circumference, which will be the 4' diameter, will be cut on my band
saw by setting up a jig that has a pivot 2' from the blade. I'm
looking for suggestions for the best way to cut the inner diameter
which will be at 2' - 4" giving the "ring" a 10" width. The material
is 3/4" thick. So far I'm thinking my jig saw or my router with a
fence set at 10" and multiple passes. Any other suggestions? As
always, thanks in advance!!

Sabre Saw?