My roommate and I had a similar dilemma--two bikes that needed a home (only we had no extra room to spare). We love Ryan's DIY solution to make the most out of a hallway...
Ryan tells us that the bike rack is his own design built by his contractor. To us, it looks like two cables suspended from the ceiling that meet below. For the cables, an L bracket has been attached on both sides for each bike to rest. We really like how the bikes are accessible but remain out of the way. The bike theme is continued with the framed bicycle poster in the background (also DIY'd). Because it was too expensive to custom frame, Ryan screwed plexigrass and panel mould to the wall--great job!
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[Images from ryannicholasjones]