Last edited by Dancingbear; 02-15-14 at 01:52 PM. Reason: Somehow inserted a hash tag? deleted it.
Not sure what your plan is for attaching the head tube but I'm pretty sure it is the same tube that Nova makes their Aluminum BB shells from.
I'd still go with all aluminum.
I really hope you make the frame before you buy all those parts, just to make sure it turns out like you want.
This is so interesting. Will follow along. I would love to do something like this as well.
I need to make a few comments.
1. Epoxies and almost all commercially available adhesives stick best to iron and iron alloys (aka steel) far better than they stick to aluminum, typically ~25% stronger: reference: Design Guide for Bonding Metals (LT-3371)
2. Given your lack of basic understanding of bicycle geometry; I would strongly suggest that you purchase and old bike or three. In San Jose we have Good Karma http://goodkarmabikes.org/ where they sell excess junker bikes for a few dollars. Some are actually in excellent condition. You may even want to consider salvaging components and/or cutting up the frame for the pieces you want.
3. Do not expect to get it right the first time.
'80s SR Sierra Sport (commuter)
'94 Trek T50 Tandem
'90s GT Triple (gravel path bike)
'85 Schwinn World Tourist (back up commuter)
'82-'84 Miyata 310 (project)
Jack Taylor tandem (project)