i have a cromor frame and it is fairly stiff for steel but also heavy, whereas spirit and the like are much higher end tubesets which are very light, and can be very stiff as well.
There is an incredible amount of bullshit put forth about steel, and subjective discussions of stiffness absent any kind of objective testing are often at the heart of it.
So, for the millionth time, all steels have essentially the same stiffness. If you want a stiffer steel frame, you have to go oversized or use really heavy wall thickness. If you don't change the geometry (including tube diameters), a 3kg mild steel frame will be stiffer than a 1.5kg 953 frame.
There is an incredible amount of bullshit put forth about steel, and subjective discussions of stiffness absent any kind of objective testing are often at the heart of it.
So, for the millionth time, all steels have essentially the same stiffness. If you want a stiffer steel frame, you have to go oversized or use really heavy wall thickness. If you don't change the geometry (including tube diameters), a 3kg mild steel frame will be stiffer than a 1.5kg 953 frame.