Originally Posted by
1989Pre
Those bikes were built by SBDU Raleigh Nottingham and were marketed as Dynatech in Britain. The Supercourse Technium in the catalog page(s) you supplied is 6061-T8 with chrome-moly forks and stays, like 90% of Techniums. There were steel (753) Team Techniums in other years built in the U.S., but the lugs were steel, too.
Rahmen=frame
Gabel=fork, by the way.
It's my understanding that the steel lugs originally used for the US road models were later replaced by aluminum lugs, circa 1990. This is most evident in the design of the seat lug, where the stay sockets flow more smoothly into the lug body. I have a 1990 road test of Technium Competition that specifically mentions aluminum lugs and the USA as the country of origin. Road tests and articles on early 1990s UK Dyna-Tech also mention aluminum lugs.
The USA Technium and UK Dyna-Tech models used similar bonding technology but different lug designs. The USA Technium models had square cut tubes pressed over necks on the lugs whereas the UK Dyna-Tech used mitered tubes that were pressed into the lugs.
Externally, the UK Dyan-Tech appear more like traditional lugs with collars that are larger diameter than the tubes. The USA Technium lugs are the same diameter as the tubes, with the exception of a narrow, slightly larger diameter ring, which acts as a seat for the tube. The USA Technium also use a seat lug with a single bolt whereas the UK Dyna-Tech use two bolts, one for the seat post and the other for seat stay retention. The subject catalogue exhibits both UK Dyna-Tech and USA Technium models.