Originally Posted by
Andrew R Stewart
Use 5NM and test the stem's ability to stay put. If the stem stay's tightly in place on the steerer then you're good. Remember that almost any single torque rating is a max not the only amount that works. Carbon paste on the stem's steerer clamp helps. Andy
Fully agree with above, follow the fork instructions, you could find another stem that may say a different torque value.
Assume you have a suitable torque wrench ?