That the clamp can take x torque, doesnt mean the seatpost can take the same torque w/o being smashed Sadly a lot of parts have to work together and then the problems starts, that a stem clamp takes whatever torque doesnt mean the handlebar has to do it aswell Carbon paste (highly recommended) and tight by feeling, turn little by little until the parts doesn't move and dont abuse if the bolt actually can turn 3/4 turns more if you go hulk to it.