What causes that kind of failure?
Poor design. A seatpost collar which has significant bending stiffness is a failure of design, the optimal design has infinite tensile stiffness and no bending stiffness, the closer you get to that the better.
@gbj_tester started
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Poor design. A seatpost collar which has significant bending stiffness is a failure of design, the optimal design has infinite tensile stiffness and no bending stiffness, the closer you get to that the better.