Maybe off base here, but 753 is really thin stuff - but there was French tubing drawn in extremely light guages long long ago, that as I understand, was never available in the imperial sizes (on thin ice here).
So, if Reynolds comes out with a new alloy that lends itself to extremely thin guages, then the dies and mandrels it needs to make the stuff might have been left over from the days when 531 was drawn in metric diameters for the French market.
Does this make sense?
Mike Kone in Boulder CO
> Reynolds is an English company and most of their tubesets were imperial, with
\r?\n> metric sizes as a less common option. The earliest 753 tubesets were metric
\r?\n> Metric might make sense if some French bike company was the first to use 753,
\r?\n> but the 753 tubes were first used by fellow TI company Raleigh, right? In fact,
\r?\n> it is my understanding that Raleigh, and particularly Gerald O'Donnovan, were
\r?\n> instrumental in the development of the 753 tubing. So what's with the metric
\r?\n> Tom Dalton
\r?\n> Bethlehem, PA, USA (where our official units of weights and measures is the
\r?\n> SI.... really!)
\r?\n> How low will we go? Check out Yahoo! Messengers low PC-to-Phone call rates.