Build a Cheap Tandem Bicycle with Just a Welder!*-* Click images for Huge Pictures
Own a welder? Have 2 junk bicycles? Ready to build your first tandem bicycle with just a welder and two bikes? Great! This project was originally inspired by a broomstick tandem I found on the web, built only from broomsticks and duct tape. I had a welder available, but the key is using the seatpost of the front bicycle in the steering tube for the rear bicycle as a pin joint. Check out the pictures below (click for full size).
A couple of critical features:
1. Full Tandem!
2. Seat post trick
3. Rear handlebars optional, I tried clamping them on the seat first, didn't work at all
5. Rear frame stay
7. Lower reversed derailleur now tensioner
10. Horn in leiu of brakes, works well enough :-)
11. Testing it out.