Originally Posted by
Sy Reene
Interesting about the too-much-torque theory.. aren't folks always warning against clamping a seatube when putting bike in a stand for fear of crushing the seat tube (ie. always use the seatpost). I can't imagine those workstands with the rubberised clamps would ever exert more psi on the tube than a 1/2" wide metal FD clamp.
In my experience, the big concern with clamping on the seat tube is not so much seat tube failure as damage to paint and graphics (carbon fiber seat tubes may be an exception). You can damage a seat tube with a work stand clamp, but you really have to try. And in any case, it isn't the seat tube that failed here; it's the front derailleur clamp.