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Sidecar for Bicycle

Build this simple design for a sidecar to attach to your bike.

Sidecar for Bicycle

In this case, it’s attached to my electric bike, but it will also work for a normal bicycle as well.

You will need:

  • 1 bicycle
  • 1 rear triangle of a bicycle with the same wheel size as your bike. I used a hacksaw to cut out this triangle from a bike I found in the dump truck.
  • 2 similar cargo racks bolted to both bike and triangle.
  • about 6-7 square feet of 1/2" Baltic Birch plywood.
Related

Steps

Step #1:

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Sidecar for Bicycle

You'll need to buy a couple of decent-quality cargo racks, the kind that has 3 or 4 mounting points. It helps if they are the same model/brand.

Step #2:

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Sidecar for Bicycle
  • One of the racks will be mounted to your bike. This particular bicycle is electric-powered, but a regular bicycle will work just fine.
  • The second rack will be mounted on the rear triangle of a donor bicycle. The rear triangle is cut out from the frame with a hacksaw.
  • The sidecar is essentially made by connecting the two cargo racks together.

Step #3:

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Sidecar for Bicycle

The top connecting piece is made from good-quality Baltic Birch, 1/2" thick. I used a handsaw to cut out the square opening, which was then discarded.

Step #4:

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Sidecar for Bicycle

Two wings, also made from the same birch plywood, are then cut out and all three pieces are connected via piano hinges.

Step #5:

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Sidecar for Bicycle

The wing pieces are then bolted securely to the top of the cargo racks.

Step #6:

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Sidecar for Bicycle

A crossbar, also from birch ply, is then connected to the lower part of the cargo racks.

Step #7:

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Sidecar for Bicycle

The crossbar is bolted on using a pair of these handy clamps. This one has a 1/2" capacity.

Step #8:

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Sidecar for Bicycle

Here is the finished product, minus the milk crate I used to carry things around.

Step #9:

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Sidecar for Bicycle
  • The finished product. Here are a couple of YouTube videos:
  • This video shows the finished product.
  • This video shows the bike rolling. Note the milk crate; very handy.

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