Golly, my first post in this esteemed forum.

I want a bike trailer that can convert to a shopping cart, so I can pop it off the bike, flip something around, and take it into the grocery store. I've looked and looked, and nothing like that seems to exist. It doesn't have to be huge, enough for 4-5 bags of groceries.

I've thought about converting one of those three-wheeled baby joggers, just not sure if they can take bicycle speeds; I've even looked at a steel folding cart (just slap on bigger wheels and an attachment thingy). I have minimal space and tools, and zero experience, but I'm willing to give it a try. TIA for any advice or resources.