Originally Posted by
francophile
Home Depot has these labeled as 'Everbilt Filp-up tool hangers' for $6/ea and they'll hold two bikes dropped inverse so the bars touch the seats.
http://www.amazon.com/dp/B0000DH4NM/
I guess you could buy on Amazon, but it's cheaper at Home Depot and that one uses a more textured, dull rubber I prefer over the shiny crap.
[MENTION=185430]dddd[/MENTION] that is seriously awesome. Are you using a double-hook, or does each bike have its own?
I designed the hooks to be able to slide each bike independently. It was a bit of extra work mocking up and then making the tool for bending the hooks, but I was then able to buy the one-foot, 3/16" diameter steel rods pre-cut for 67 cents each in quantity and come up with the best dimensions for the job.
Hard to see, but there is a concave roller on the tool's moving driver peg. The anchor peg (socket-head cap screw) and mandrel (stack of fender washers) are stationary. I tested it bending up to 3/8" rod, but 3/16" rod proved more than strong enough for a 40-Lb Schwinn Varsity.