I can't get over how expensive bike stands are.. so I usually make my own. This one came out exceptionally easy, so I thought I'd share it!
Step 1: Parts and prep:
You can get away with different dimensions, but these are optimal for the handlebar width of a bike, and mounting to a 2x4. Just remember if you change how far the stand projects from your post or wall, to allow the handlebars to clear the wall.
Cut according to the image.
Step 2: Assembly, finishing touches
Screw the parts together as shown. Be sure to drill pilot holes for the screws, as screwing into the edge of 3/4 plywood without piloting will invariably cause splitting. (1/8 pilot drill bit for a drywall screw).
To protect the bike finish, I taped some cardboard to the divots where the bike frame is clamped. A few wraps of duct tape or something more elegant will do just as well.
For my own writeup, see: