Originally Posted by
rm -rf
I've shortened an inexpensive carbon seatpost maybe 12 years ago. And cut off carbon steerer tubes too. Those short cutoff tube sections are really strong. The 6 nM won't hurt the seatpost with the compression from the frame clamp.
At random, I checked Ritchey's website for carbon seatposts.
Their $58 Comp 2-bolt says "Seat collar torque: not specified - follow frame/seat binder specification"
Their $99 WCS Link says "Seat collar torque: not specified - follow frame/seat binder specification"
Their $270 light Superlogic post says: "Seat collar torque: 6Nm (max) / 7Nm (max) for Ritchey steel frames" And it's description says: Made from a lightweight carbon fiber layup developed for Pro Tour teams at the highest level, the SuperLogic Link post offers more vertical compliance with no loss of lateral or torsional stiffness.
I don't think the carbon version of the Ritchey WCS Link seat post can be had for only $100; that must be the aluminum model.
I agree with above recommendations to tighten to the least torque without slippage. I also agree 6 Nm should be fine for most CF seat posts. The torque limit is probably there to protect the CF frame more than the CF post; if you do not believe me, keep torquing it and see which cracks first.
