The Technium was an aluminum tubed bike (main triangle only, I think) bonded to steel lugs with some kind of glue.

I'm not exactly sure about cold-setting a frame like this, so I'd measure the rear spacing carefully and get a wheelset whose over locknut dimension (OLD) matches that of the frame.

The inner chainring is probably something like 42 teeth. That'll match up pretty good with a 16T cog or thereabouts.