Mould 139 is Sykes designated Heavyweight Men’s Single Scull designed around a 90kg midpoint.Following the successful launch of Moulds 137 and 138, Sykes has updated the hull shape of M139 to be in-line with our 5K single scull range. The new shape has improved stability and less drag, and allows for either a bow (carbon) or stern (aluminium) mounted rigger.