Our 17’ Double-Ender, Grumman is a rare Light Weight model with hull thickness of 0.032″ for canoeists who do a lot of portaging. The Light Weight models have extra ribs (7) to offset the thinner hull material. For comparison the standard 17′ Double-Ender weighs 75 lbs and this Light Weight, 60 lbs. The newer Marathon boats have hulls that are 0.060″ thick and, as a result, weigh in at 81 lbs.