Current Projects chat and miscellany

If you don't change the geometry (including tube diameters), a 3kg mild steel frame will be stiffer than a 1.5kg 953 frame.

you are normally better informed. are you not well? lacking some sleep?

2 identically dimensioned frames in tube O/D and wall thickness but one made from cheap cro-mo, the other a high end steel will have the same stiffness

That much is true, but I thought it didn't need spelling out that the one which is twice as heavy necessarily has the greater wall thickness. Are you not well? Lacking some sleep?