5/16-18 IIRC. I have had almost no luck with JR's method, although I keep trying! gggg Frank DuVal >I'm removing the steering wheel on my '65 Monza coupe. I have a steering wheels puller, but the incorrect size bolts to go in the holes. What size bolts fit into the steering wheel? It's the standard with horn ring. > >Charles 4/19/08 > > >