Instructables

Shopping Cart Bike Trailer

Step 3: Attach the wheels and front leg

Picture of Attach the wheels and front leg
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Temporarily clamp on the forks with the wheels installed to figure out where the cart would be balanced so that some weight remains on the front end where it will hook up.

I made a front leg for the cart so it can stand on its own, e.g. if you want to take it into the gocery store (an exercise in social engineering I have not tried yet). The leg has to be in the right place to balance, yet to not interfere with the bike. I initially wanted to attach one of the swivel wheels salvaged from the original undecarriage, but it didn't work very well, so I scrapped the idea and am keeping them wheels for future projects.

Keep in mind you need a strong part of the cart to weld to, so you might be constrained by that. If this is a problem you could weld a different piece of scrap metal to a strong piece of the cart and then to the fork.
Mark the spot, weld on the forks.

Fix welds on the cart that may have come loose in the straightening process.
 
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Whamola4 years ago
How did you end up attaching the forks to the cart?  A picture of what you welded to would have made this step a lot better. 

Thanks
berserk (author)  Whamola4 years ago
I keep meaning to get a pic to respond to your question. I welded the sides of the forks to a thicker wire (~8mm) that ran down the side of the cart in an S-curve. The "s" gave me three attachmetn points. Probably not the most solid way to do it.
Since then the fork has pulled loose on one side. I re-attached it with some thick wire using a Clamptite (http://www.leevalley.com/wood/page.aspx?c=1&p=59452&cat=1,43456) tool. It's been running will with that repair since.