We took a bunch of bike wheels and zip-tied them together into a dome
Most bicycle shops, we found, throw away old and broken wheels. They still work fine for this project! You could buy them for a decent discount, though, if the shop keeps them.
After you have a good number (we used about 40), it's pretty simple. Just stand them up and use zip-ties or wire to attach them.
We had 12 26" wheels for the bottom layer and 12 24" wheels for the second. The size difference gave us an inward tilt. 8 24" ones for the third row, with 2 wheels for every 3 of the second row. The top was 1 24" wheel connected to 3 rims without spokes. The rims overlapped with the third row.
Thanks to Stevie's Happy Bikes, our local bike store that gave us all the wheels!
Finalist in the
karg made it!