We just made a longtail cargo bicycle from a second-hand Ukrainian mountain bike. It was made in Haiti with a minimum amount of tools and measuring, but it rides well. This bike has carried three adults (400 pounds total) without catastrophic failure. It is currently being tested/abused by the teenager pictured.

Step 1: Find a bike

Find a bicycle for as cheap as possible then cut the seat-stays about here, and the chain-stays just behind the bottom bracket.
<p>Great instructions and a big inspiration! I can't weld so I extended a mountainbike frame with wood, epoxy and carbon fiber tow. You can watch a short video of how I made it here <a href="https://www.youtube.com/watch?v=_gss4TuZqr8" rel="nofollow">https://www.youtube.com/watch?v=_gss4TuZqr8</a> or by serching for &quot;DIY longtail cargobike mads&quot; on youtube.</p>
<p>Having done this my self I would recommend extending the seat stays and chain stays, as with this method you can use thinner tubing and avoid welding on the seat tube, which if a melt through occurs will cause problems fitting the saddle.</p><p>I used this (above) method, inserting thicker tubes, and it works fine. I enjoying riding the bikes and it a very useful thing to have.</p><p>If you would like to read about my experience then Google:</p><p>&quot;dorky thorpy longtail cargo bike&quot;</p>
Hey, thanks for the design! <br> <br>I want to pick your brain a little bit--I pretty much need this bike, plus platforms and a heavy-duty kickstand so it won't be exactly the same... <br> <br>First, do you have any concept of how much extra weight this put on the bike? i.e. are we talking five pounds or fifteen? <br> <br>Second, have you tried making a sturdy kickstand for it? and if you have, what are the chances of you putting THOSE plans up too? <br> <br>Thanks again :-)
Hi, I didn't add a kickstand. I don't have this bike anymore so I can't weigh the bike but I'm guessing this modification added 10 pounds to the bike. Goodluck.
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&nbsp;just built a bike like this based on this instructable, even used the same welding machine. &nbsp;turned out great! &nbsp;Thanks for the write-up/inspiration.
That's awesome, I'm happy to hear it. <br />
Don't let that 'chicken' into my coop! The cox comb doesn't fool me: the beak and head belong to a raptor. A great bike!
cover those legs and arms not only against the sparks.I have the scars to prove that but the UV light&nbsp; and use a mask <br />
i was reading about a guy who was restoring his car and used a welder for prolonged periods (a few minutes at a time within like a few hours) he ended with a tan with tan lines the size of his goggles!<br />
He said 'hole' ! lol
Awesome, that's like a pick-up-bike!
Great build--nice chickenhead welding mask, too.<br />

About This Instructable


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Bio: I'm working in Haiti and living in the lovely city of Port Au Prince.
More by depp.ben: How to Build a Cargo Cycle Truck How to Build a Longtail Cargo Bike
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