Over 40% stronger on ultimate strength test than the strongest production seatposts on the market! The Thomson seatpost has a clamp, head, and upper tube strong enough to withstand 350 foot-lbs of torque. Natural ellipse bore inside tube for optimum strength to weight ratio. The Thomson seatpost has all parts captive and can easily be attached to a seat without disassembly. Very low profile clamps - no seat interference - swivel nuts are down between the seat rails.