Originally Posted by
ldmataya
I too would never use a threaded fork for this purpose. First of all I would never f*** with anything having to do with steering the bike. I check stem clamp bolt torque every week and definitely before any event. Remember that while there might be enough material in a threaded fork to handle the stresses, it is never tested for that scenario. There are very different loads on a fork stem between threaded and threadless.
I wouldn't even go that far. No one has ever made a steel threadless steerer with walls as thin as where the threads are cut into a threaded steerer. If it was "enough material" that's the amount they would use. It is not.