Originally Posted by
velosprinter
I am thinking about building a bamboo tandem. Any thoughts on boom tube size? I was thinking 2" then 1 1/4" for the rest.
I don't know anything about tandems....is the boom tube the one that goes from bottom bracket to bottom bracket?
If you look at my bike above, I used 2" poles for the main triangle. Tubes that are only 1 1/4" in diameter might be too small which could cause your frame to flex. If your frame flexes too much, it will likely break at some point. I would probably go for something closer to 1 1/2" and maybe slightly larger.