2-speed sailboat winch Series-S

The drums of the new Series-S and Serie-E winches are featuring vertical ribs placed in an asymmetric order with uneven distances between the ribs. A line under load will deform over the ribs but when easing off the line over the Seldén drum, all indentations are not simultaneously reaching the next rib. The line will have less tendency to “jump” out but will rather slide out with control. Seldén calls it Asymmetric Rib Technology (ART).