Originally Posted by
pesty
Can't speak to the CG-R on comfort, but most Specialized seat posts have the same clamp these days, including my Allez Sprint (shared with the 1st gen Venge), and you have to tighten the F* out of it to keep the saddle from tilting. I have an adjustable torque wrench and I had to put 12nm into it before it would stay in place. Was a little disconcerting as I have a carbon railed Brooks and I was really worried about damaging the rails.
Not sure of the science behind it.. but I'd hazard to guess that the amount of torque req'd is somewhat dependent on the surface area of the clamp portion that is compressing against the saddle's rails. A clamp that spreads the compression over a larger platform area, has a different ability to clamp (for a given torque on the bolt) than a clamp where the compression is confined to smaller clamp area. Likewise, a smaller-area clamp type, is focusing the compression to a smaller area obviously, perhaps making it more difficult (or unnecessary) to torque as much without damage to the rails. ie. smaller clamp = more biting force? Somewhat a PSI thing..