Ergon smc4 saddlethe smc4 provides even more comfort and improved pressure distribution compared to the smc3s softer structure it offers optimal pressure relief in the perineum area thanks to a 9mm relief channel the extra large seat reduces pressure peaks and distributes the pressure on the sit and pubic bones features shell nylon gfrp rails crmo cover duraskin padding orthopaedic comfort foam weight 300g s 305g m buy ergon components from chain reaction cycles the worlds large