Minn Kota Fortrex Trolling Motor Freshwater Bow Mount MDI (Mega Down Imaging) Available On Select Models! US2 (Universal Sonar 2) Available On Select Models! Fortrex We left the solid, extruded aluminum arm on the new Fortrex™ exposed, so everyone on the water can see what they're up against: the most ruthless mount we've ever unleashed. With fewer moving parts, tighter tolerances and less give, Fortrex is the beefiest, meanest, quietest motor ever. Consider yourself warned.