• Not surprising that this thread had taken off (sorry) on a cycling forum. Very early planes used bike tubing and lot of the planes here have reynolds steel tubing in them, the expertise developed for aircraft tubing was used in the development of 531 so there's a nice synergy between bikes and planes.

    [SIZE=3]From the Reynolds site .....'But again through intimate knowledge of aircraft steel the Company was ultimately able to develop a super-light, high strength, steel tube for cycle construction, which still holds its place amongst all the material available for this purpose. The tubing was "REYNOLDS 531", which became world famous. '
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