Reader Josh sent along the following . . . 49er hack.
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This bike is used by a Gold prospector in the San Bernardino mountains outside of Los Angeles. It's constructed out of electrical conduit and scrap aluminum. I wish I had a pic of it all loaded up with his gold panning gear.
If you look closely you can see that the owner, instead of trying to attach the top of the rack near the rear of the bike has wire-tied it along both sides of the top tube. There is also a bolt through the top tube and conduit near the head tube to secure it all extra good-like. It may look tired but it gets the prospector and his equipment to the river every weekend.