I used a 3 speed, gear-hub, girls bike, but you could probably adapt the simple design to work with any bike. The end result is pretty goofy looking but very effective at hauling people and cargo. You can find a bike like this for $15 at goodwill and should plan on spending $10 on the bolts and wood.
Step 1: Tools and Materials
1" paddle bit
1/2" twist drill bit
x4 lag bolts, nuts, and washers
x2 6 foot long 2x4s
( you may also want a spokeshave/ sanding block to shape the peddling area and a coping/ jigsaw to cut out the front brake area )
Step 2: Marking
Step 3: Notching and Drilling
Step 4: Finishing Touches
- Rows of holes along the top edge of each side so you can temporarily jam in bamboo sticks or dowels to make more of a table like surface (for carrying a stack of pizza boxes)
- I also shaped the part of the rack where it sits between your legs, so that if you do accidentally brush against it while peddling, you won't be hitting a corner, just a nice rounded edge.
- The lower half of the rack's ends are tapered, just so it doesn't look like a battering ram.