Oops! I meant Birmalux rims, not Benelux.
> Could 1971 be near the first time that an extruded rim was produced for a
> bicycle?
> I could be quite wrong, but I can't recall any extruded doublewall rims,
> such as the 1320s, prior to this, with tubulars of that era being formed
> from aluminum tubing, and alloy clinchers, such as Benelux**, being
> apparently formed (in this case rather poorly) from aluminum strip.
> The Super Champ Model 58's are, with their twin-hollow extrusion, the
> earliest extruded rims that I'm familiar with, though Nisi Evian and
> others were common by the mid-1970's, and, wait a minute here, a second
> look at these 1972 Weinmann singlewall rims shows a welded seam but I
> can't really tell if it's extruded or formed from strip.
>
> David Snyder
> Just wondering in Auburn, CA