| > The frame says 20-30 Reynold balanced tubing.
> Would anyone know how 20-30 decodes -- what kind of steel it is?
More likely decodes to the tube thicknesses.
Different parts of a bicycle frame, including different parts
of a single frame tube, have different strength requirements.
Making a tube thinner where less strength is needed costs more
but makes the frame lighter. 20-30 might indicate that the
main tubes are 20 units thick at the thin parts and 30 units
thick at the thick parts.
The numbers could also be just a model number for the tube
design and have nothing to do with any real-world units.
The steel is almost certainly a chrome-molly alloy.
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