Originally Posted by
carleton
True.
I've heard of stronger guys reinforcing their carbon steerer tubes with steel pipes/sleeves to combat this. I'm not familiar with this practice.
Cervelo stems come with a glue in tube instead of an expander to reinforce the steerer. I put a tube down a fork that was overly flexible and it stiffened up, also allowed use of a 1" star nut instead of the expander which was slipping. I am not sure if the end of the tube might provide a stress riser so it is not clear that the steerer is any stronger at the limit.