Originally Posted by sch
Your boom is a whole lot longer than the boom in the biketcba site's example, but that is what I had in mind.
Seat post has to bear the weight of the rider plus all the vertical loading induced by bumps, jumps and holes. Whole different scenario from the boom which is absorbing the torque of legs pushing on the pedals. It will move, if it breaks you might fall, but not as bad a scene as broken seatpost where torn scrota, perforate posteriors and falling off the back of the bike can occur.
Steve
This
biketcba? I'm not sure what example.
torn scrota and perforated posteriors don't sound like fun, but my fear is parts of my anatomy getting sucked in between the spinning wheel and the frame on a DF when behind the seat.