For various reasons I want to have a 25.0mm threadless steerer. I have some 1" 4130 steer tubes and my plan is to turn one down to 25mm at the stem side.
I am wondering if the remaining wall thickness is adequate to hold a not too heavy rider.
I have a suspicion that the wall thickness of 1" steerer tubes has been mostly dictated by the need to fit a 22.2 quill stem inside them.
I do not care much about stiffness, only durability.
Does anyone think that this might not be such a terrible idea?