Rex, my stitching is coming undone and I'd like to get a new steering wheel. The one I have has nine bolts in the center. It is 3 3/4" from one, to the farthest one, and 1 5/16" from one, to the next, all measurements center to center. The total diameter is 11" from center of rim to center of rim, so I guess it is a 12" wheel. I can't tell from your catalog what might fit. The boat is a 1981 Biesemeyer.