Don't worry for one second if the 155 will be adequate, it will. I ride with several 163's, the only thing the 163 will do better is starting from a dead stop at the toe of a slope in bottomless powder (two days per season), it will continue to creep at 2MPH where the 155 will trench and force a turnout. Hit the same hill at speed with the 155 and you'll never know the difference, you may actually see the 155 outperform the 163. I wouldn't have purchased a 163 over the 155 even if the price was identical. By the way my 2014 runs the pants off my 2012
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