Originally Posted by
HillRider
The torque you use is dependent on the steerer material and stem material not the bolt size since the real consideration is how tight it has to be not to slip and no more. My Easton aluminum stem specifies 5Nm but doesn't say what steerer material. I find 4Nm on a carbon steerer is plenty to keep the stem firmly in place and higher would accomplish nothing.
Just read this after my reply. I’ll dial it down