[Max01]

Dazu findet man sehr unterschiedliche Angaben. In der Regel beträgt die Vorspannung 4-5nm (man findet Werte zw 1,6nm-9nm), also in etwa so viel wie an gängigen Vorbauten (5-6nm) die Schrauben ebenfalls angezogen werden.

Cane creek schreibt dazu:

There is not always an exact torque rating for the preload bolt, so it’s sometimes hard to know if you have applied enough preload, or too much.

If there is too much preload, then your handlebars will not turn easily.

If there is not enough preload, then you will have play between the steerer tube and the headtube – you can check this by setting your bike on the ground, grabbing the front brake, and rocking the bike back and forth. If there is play, you should definitely feel it, and you can also visibly see the play in the gap between the bearing cover and the headtube when you rock the bike back and forth.

A good rule to practice is when you reach down to your handlebar spacers, then you should not be able to turn them easily by hand.

If you can easily turn them, then you likely do not have enough preload. If the spacers are staying in place, and the handlebars are turning like they should, then you’ve applied the appropriate amount of preload.