gerardvroomen wrote:It is important that the sleeve extends below the top bearing,
although this ended up being important for the wolf SL forks, it is my current understanding that this doesn't apply to the 3t forks.
the insert is 75mm long. max stack is 40mm above the "volcano" (headset top cone), stem clamp heights tend to be around 45mm. so the insert is typically 5-10mm shy of the top cone, plus 15mm of cone equals 20-25mm from the bearing.
i remember the whole wolfSL fiasco as it was unfolding. AlphaQ, TrueTemper, disagreed with Cervelo's max stack recommendation, AlphaQ did not intend for their insert to pass to the lower bearing. Their first generation inserts, that were 100mm long and thicker, were designed to go that far. cervelo stated a lower max stack, and wanted the insert to go to the bearing. in the end, the steerer was just not very tough for reasons beyond where the insert went, as a couple failed big time, and during recall, i saw a lot of recalled forks that had the beginnings of steerer failure even with an insert.
rant over, what i'm saying is 3t has stated that the insert does not have to pass through the top bearing. it is not a design requirement.