The MX line has been tried and true with Kastle for over 5 years now without many changes at all. For 2018 Kastle laid out an entirely new MX line and that comes back unchanged for 2019. You of course get all of the same fantastic quality you should expect from a Kastle with just some slight updates. The most glaringly obvious change is a new size run. So instead of MX 78, 83, 88 and 98, now we have MX 74, 84, and 89. The biggest improvement, I would have to say, is the new contact point structure. What we mean by this is the contact point and widest point on older MX lines was all the way at the very tip and the very tail of the ski. For 2019, they have brought the contact point for both the tip and tail of all MX skis in closer towards the middle of the ski. The biggest change in performance will be a tighter turning radius or you can think of it as entering and exiting a turn a bit easier than in the past. Ski Features:Hollowtech TipSandwich Sidewall TitanalStandard Camber0.5mm Titanal Base and Top SheetABS SidewallsAsh and Silver Fir Wood CoreWeight:148cm=1483g156cm=1563g164cm=1643g172cm=1723g180cm=1803g