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Skis Fins Bindings
Has anyone given much thought about the concave depth on high end skis? What works best? Deep or shallow concaves? Doe's it really matter? Pros and Cons? I notice for the most part shallow in the tail and deeper under the bindings.
edited June 2015
There's been a lot of playing with that. Look at the step bottom skis like the Connelly V's, HO S1&2 and CX, and a bunch more. I think they figured out the concave limits years ago when they realized the more important aspect there was the bevel.
And a bunch of other stuff
I doubt there is an "ideal" concave depth if considered in a vacuume. Each part of the ski - flex, bevel shape, rocker, torsional stiffness, width, etc. - relate to one another. The perfect depth of concave relates to all of those elements in combination. In other words, you can't say this depth is best without taking all other design factors into account.
John Wilkins- Si non pro sanguine quem ludus ne. #iskiconnelly
too many other factors to worry about, just go grab one and ski.
Open or 55K Rated Skier
Most skis have a constant radius concave, which means the depth of the concave will be dependent on the width of the ski. That's why it's deeper up under the bindings than at the tail. As a general rule a ski with a deeper concave will sit deeper in the water, be more stable, and be slower. A ski with a shallower concave will be faster and ride higher on the water, but you lose some of the stability.
When you're cutting behind the boat or making a turn (basically any time you're not riding a flat ski) the water contacts the bottom of the ski and it must go either up and create spray, or it must go down and create lift. With a deeper concave more water is diverted up to spray, with a shallow concave more water goes down and creates lift. If there were no concave the ski would skip out of the water very easily. If the concave were super deep you would create lots of spray, pushing the ski deep into the water and making it super slow.
In the end...most high end skis are very similar when it comes to concave depth. Ride the ski that works best for you, or the one you get the best deal on
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