Originally Posted by
carpediemracing
Based on the following image it seems that two 90 degree brace things, with a spare front axle and misc stuff, would work well. Some of us have tons of stuff like that laying around.
That's what I did to mount bikes in my VW bus. I just pulled the axles out of a few dead old hubs, used some scrap angle iron cutoff to make 90° brackets, drilled them, and used two outboard cone nuts to hold the axle in place.