There once was a lonely tandem bicycle, longing for a partner. An old hobbled shopping cart was lonely as well. Thanks to the work of reader Joel, these two were able to get together and have a beautiful relationship. Cue the romance music . . .
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I made a basket out of a shopping cart for a tandem bicycle.
I welded a cut cart to a seat post for the rear, and now we can go get groceries easily! Always get tons of thumbs ups, some people even asked if I bought it online. Nope!
The cart was from a local store (asked the manager for one with a busted wheel). picked it up with a normal bike and rode home dragging it along side of me, very noisy but got it home!
A seat post for the mount, welded braces to help support the load. The seat post is locked in place normally so you can remove the basket and re-attach the rear seat. The basket was designed to fit between the rear rider's handlebars so the basket does not spin.
The cart was shortened so it was not so tall. I had to weld rebar across the front of the basket so the cart's door would stay in place.
When I ran this idea past friends we all thought it would be too top heavy, hard to balance with all the weight, etc. Turns out it is very stable and centered, and even with heavy loads you barely know you have 20-50lbs back there.
I've transported simple stuff like food, but more challenging things like a drill press, large postal boxes, tool boxes, guitar amp, among other things.
Some carts come with cup holders near the handle, so I took that cup holder and attached it to the handle bars. Took the scrap pieces from the cart and recycled them as well.
We live in Missoula Montana, a very bike friendly city so we always opt to ride when possible to run errands.
We call this bike the TRUCKFIGHTER, and it's tough!