3.75" rise bars because I like my bars way up there (better on the back) and 22.2mm because I can swap them out between bikes.
I'v got my fatty set up single speed at the moment. I'll probably make a suspension fork for this thing some day. There are 10X more sand trails than bicycle only trails here in east Texas, so I can actually see riding this a lot. I am pondering filling the frame with yellow stuff insulation to make it water proof.