Instructables
Picture of Bike-Portable Shopping Cart
This project shows a way to bring the groceries from the cash desk in the supermarket into the house. To do so, I designed a stable shopping cart that can be carried on the rear rack of a bicycle. The wheels can be folded down to use the cart at standing height. Beside shopping cart it can also be used as a child stroller with room to store things. No modification at the bike is necessary to use this cart in a simple and versatile way. Simple, because you can easily take the cart on and off the bike. Versatile, because you can think-up many applications. The wheels are nearly 20 cm or 8 inch, so you can drve with ease on streets and sidewalks. Also low thresholds are no problem, that different from the usual shopping cart. The container is made from 9 mm or 0,35 inch thick multiplex board, glue'd and nailed together. All parts of the cart you can buy at the local diy market. I used the castors of an old  rollator. The weight of the cart is 11Kg or 24,25 pound. The volume is 50 liter or 13.2 gallon. A building plan, an instruction video and many photo's are making this project easy to replicate.
                                                                           The movie

            
 
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Step 1: Building material

Picture of Building material
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I like working with wood. It fits in well with this project. You can buy it in the local DIY shop and you can edit with common tools. I took a 61cm by 122cm or 2x4 foot multiplex board. See picture 3. Birchwood 8mm or 0.31 Inch at the outside and the stronger 9mm or 0.35 inch standard multiplex at the inside. See picture 4. Now we can start drawing the sizes on the board.
sLsM1 year ago
Fantastic project! I am planning to build this. One question though, bear with me if it sounds dumb, but how do you lock the box onto the bike rack? Is it just the weight that holds it in place or is there something I missed? Love this and many thanks!
IamWe you are a person of great foresight and whimsy I loved your Instructables for the bubbles! Ai 51 I still love to blow and run after bubbles! One of life's simple joys!!
Great and super creative idea! This could be the next best thing after reusable totes as far as being a Conscientious Consumer !!!!
Now if we Americans could just get off our tushies and bike places, we might not remain the World's Most Obese and Resource Wasteful Country!!
skorpijon1 year ago
Awesome, I love it! I will make it. Thank you ;)
tstupple1 year ago
Dit is een briljant idee, echt iets dat ik van plan op het bouwen, om te helpen met de boodschap
kishida1 year ago
I like the way it jsimply rolls on and off the bike rack and that you don't need to keep on moving groceries in and out of different places. You've inspired me to make my own. I might try to use lighter materials, maybe tent parts (tent poles, tent fabric, baby buggy wheels). Thanks, Ken.
Awesome idea! This really is a creative way to solve shopping on your bike & having to constantly pack/repack everything. Fantastic!
"0,35 inch" nobody uses decimal inches. That's as much baloney as saying 5 3/16 cm.  Totally bogus, right? Besides there is no such thing as 0.35 inch multiplex. The correct nominal value for the equivalent component is 3/8". Please read this pdf explaining the proper way to do this sort of conversion.
Although, reading the rest of it, you actually did a pretty good job with the conversions for most of it.
boempa1 year ago
Geweldig! Geen fietstassen meer nodig, je hebt gelijk je boodschappenkar bij je.
Love this build, so pratical for everyday grocerie shopping!
catsco1 year ago
Brilliant!
Love the collapsing wheels!
DutchJean1 year ago
Fantastisch! Absolutely wonderful! You should sell these. For unhandy folks like me.
This is absolutely fantastic, honestly I can't think of anything better to say then that about it. I love how it rolls up to the back of the bike locks down & then off you go. I really hope you win the contest.
Ok, when I first saw she was "dragging" it across the ground I was going to say wow this is durable, then saw the little wheels at the end, this is a very good looking bike rack/shopping cart, A+ :D
First thing that came to mind is johnny 5 the robot off of short sercut. Sorry about the spelling and if no one thinks the same. It might be because I'm going on an hr of sleep. Our cat was in labor all night. So far 2 still born and one healthy boy. I think one to go
You should enter this project into the Bikes and Wheels Contest!
artlife1 year ago
Fantastic! This is a great design.
You should start selling these in stores and bike shops!
Nicely done. Really, it's deluxe! I like the idea of using your own cart. Are most stores allowing that? I don't see any problem with it unless the cart is really big or has something that damages the floor. Yours looks smaller than a standard cart and has good wheels. I like the trailers made from buggies (the plastic ones are far lighter!) or modified kid trailers. Mine can just be pushed or pulled on its 2 bicycle tires (poly foam), and hooked back to the bike when done shopping.
saosport1 year ago
great idea
ynze1 year ago
Great cart, Berto, and a great instructable too!
J-Five1 year ago
Genius, pure genius!!!
rimar20001 year ago
WOW, this cart is a dream. You would make it to market!