Ozone have been making kites for God knows how long....years. Why now do they introduce a 10m into what has always been an odd numbered set up? What s the thinking here?
One possible consideration:
Some have a full quiver of Edges: 7, 9, 11, 13, 15 and 17. Some cover the range with 7, 11 and 17, wiith each size incremental decrease being about 35% smaller.
For someone who wants to economically exploit the full range including the new 19 though, without buying every kite, no combination works without leaving a big incremental discrepancy... unless they have a 10, which allows a reasonable compromise: 7, 10, 13, 19.
Good points James. But I think that is more of a side effect of the real reason:
Racing rules require that only 4 kites be registered, and from specific ranges: (small<9), (medium<11),(11≤ large≤15), (15≤x-large).
so to maximize competitive wind ranges vs. size limitations most normal sized racers would benefit from registering something like: 7, 10, 13, 17.
Hence a 10m.
The 19m is for bigger riders (like me) or extreme lightwind venues, where one might register something like 9, 11, 15, 19. or 9, 11, 13, 19.