I'm pretty sure the Voyageur 11.8 has chromoly main tubes, but high-ten stays, and the later ones from the '80's were full chromoly. As pastorbob says, the "11.8" refers to the complete bike's weight in kilograms. The Super le tour 12.2, from about the same time period I believe, was slightly heavier (12.2 kilograms), mostly because it had steel rims instead of the alluminum rims on the Voyageur 11.8. Maybe someone else who's more familiar with the Voyageur 11.8 will know for sure about the chromoly main triangle, high ten stays on the bike, I'm sure about the Super le tour 12.2 having this type of frame, not positive about the Voyageur 11.8. In the real world, you'd never tell the difference anyway, especially on a touring bike............Sounds like a great project, good luck with it-