I believe it has always been 145 Tsunamiat. 24.5" at 350 lb max; 170 Tempest, 22" at 325 lb max; 175 Tsunami, 24" at 400 lb max. 180 Tempest Pro, 23" at 400 max. (from recall). Displacement is directly related to length/width/draft. What puzzles me is how they made the new 140 Tsunami the same width as the 145 Tsunsmi, 25.5", but the max cap is 325/350 lbs respectively. Yet the old model 140.Tsunami, 24" had a max cap of 325 lbs. That tells me somebody in marketing is fudging numbers.
Anyway, the weight rating should put the boat at a proper load water line that favors edging. You made me think of something that has been baffling me since I started using the 175 Tsunami again. I gained valuable experience over the past three seasons that improved my tracking in the 145 Tsunsmi, I expected better results in the 175 Tsunami, because I recall being able to edge the 175 without aid of a rudder. Now, I find the 175 nearly uncontrolable without the rudder. The only change is dropping 20 lbs of bidy weight, which puts me in a better weight range for the 145. Conversely, the 175 was the better boatbfor me at 255 lbs, but now I wonder if my lower weight affected the favorable trim characteristics of the 175. It now behaves closer to the 145 Tsunami that I moved the seat rearward by 42 mm. I mightbtry ballasting to see if I can improve the handling, because i hate the rudder.
Thereās more to fitment than overall length, width and deck height. The 145 is wider than the 175 and has a taller deck, but the 175 front deck is 18 inches longer, giving it much more foot room. Iād like to try the 140 Tsunami, but the foot room isnāt adequate being that the deck is lower, shorter, with less width, and Iām back to overloading it. I enjoyed the 125 Tsunami, 26" at 300 lb max cap, because it handles well. Is easier to load and carry, itās reasonably fast, but Iād need a spray skirt becauseb it rides lower from me overloading it. Great boat for anyone between 150 and 190 lbs.