I've got two salvaged wal-mart clunkers I'm trying to join together. I'm going to hacksaw the BB from one, leaving the downtube to mount it on the other bike. the thought I'm playing with is no welds -- if I leave the head tube on the down tube, I could put one head tube on top of the other.
1. How to connect the head tubes so they won't shift from side to side when pedaling.
2. How to make a longer steerer tube to reach the tope of two headsets.
I'm trying to stick with recycled parts due to budget constraints. Of course, I have an aquaintance with a junkyard if I ccan find time to get over there.